iTunes SyncServer.exe Error

Thursday night I decided to go ahead and install the latest iTunes version 9.1 (the iPad compatibility update), even though I usually wait a little while after an update comes out just in case there are any bugs that surface.  After installing the update my computer would no longer recognize my iPhone. Each time I connected the phone I would get a message stating that SyncServer had stopped. SyncServer is the process that allows the synchronization of the iTouch an iPhone devices not only with the iTunes library, but also with the MobileMe service.

I figured something must have gone wrong with the installation or with the conversion of the iTunes library to the new library format, so I removed and reinstalled iTunes.  Well, that didn’t do the trick; I still had the same SyncServer error.  A quick Google search didn’t yield anything useful that might indicate a solution to the problem, so in a panic I contacted a friend who works for Apple for assistance.  We went through the usual iTunes support routines to resolve errors and after an hour and a half still could not resolve the error.

Being a software developer myself, I proposed that we look at the offending program that was being called by SyncServer rather than suspect it was SyncServer itself causing the problem. libtidy.dll!__tidyAttrNext@4 was the indicated program/entry point that seemed to be causing the problem.  A command prompt search of the hard drive found that there were indeed conflicts with this DLL. There were two versions of this DLL on the computer, one for Apple and another for one of my development environments.  Renaming the libtidy.dll from the development software and restarting iTunes did the trick. The new version of iTunes works like a champ.

Apparently version 9.1 installs a newer libtidy.dll that probably has a modified AttrNext routine.

If you experience this same problem but find that you don’t have another libtidy.dll on your system, try looking for duplicate copies of sqlite3.dll or libxml2.dll.

Update: My reference to sqlit3.dll should have been sqlite3.dll (thanks Umurkan!)

Update: I found that Binary Fortress has a fix for this: http://www.binaryfortress.com/itunes-com-fix/ . I have not tested this but I think it is worth a try if you are still having problems with iTunes.

Update: For iTunes backup problems, see this post: http://cgatesmobile.wordpress.com/2010/07/04/itunes-and-your-time-zone/

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158 Responses to iTunes SyncServer.exe Error

  1. Yvette says:

    Hi, I’m experiencing the same problem on my PC after downloading iTunes 9.1. I was searching on how to solve the problem and came across your blog. I would really appreciate it if you can teach me how to solve this problem! I’m really desperate! Thank you so much for reading this and I hope to hear from you soon!

    • Yvette,
      Search your compuer for the file called LIBTIDY.DLL. If you find this file anywhere

        other than

      the Apple Folder (on Windows it would be in C:\Program Files\Common Files\Apple\Apple Application Support) rename the file.
      To rename the file in Windows Explorer, right click on the file and select Rename from the pop-up menu.
      Rename it to something like LIBTIDY__.DLL.

      Please note that renaming this file will break whatever application was using that file but will make iTunes start working again.

  2. Karen says:

    Help! This is exactly the problem I have been having. My itouch will not sync because of the syncserver problem. However, when I search for the extra libtidy.dll, I only find the one. Any other ideas or help?

    • Karen,
      Try looking for duplicate copies of SQLIT3.DLL or LIBXML2.DLL.
      If you find either of these and they are not in the Apple Application Support folder, rename them.
      Then restart the computer and try iTunes again.
      Let me know what you find.

  3. Karen says:

    AAAH! Driving me crazy. I have sqlite3.dll in commonfiles/apple, and the same with libxml2.dll. However, if I use windows vista to search for either file, I get two responses. No libxml2.dll in ANY location and sqlite3.dll on the desktop, try to rename it and it says it cannot find the file. Searching windows explorer for sqlit3.dll nets no file either. Whew.

  4. Karen says:

    Oops. Further information on that is that both files exist, just cannot be searched for some reason. Both are in the common files/apple application something or other. :)

    • Karen,
      If you want to try to search for the files from the command prompt, here’s how:

      1. Click on the Windows Orb (what used to be called the Start button),
      2. In the Search field, type cmd and press enter,
      3. In the window that opens, type cd \ and press enter,
      4. Next type dir sqlite3.dll /s and press enter,
      5. Be patient for the search to complete as this is searching the entire hard drive. You will know that it has completed when it comes back to a blinking prompt.

      When the search is completed, it will either say “File not found” or give you a list of the files it found. If it finds more than one of these files then you need to rename the one(s) that are not in the Apple folder.

      You can repeat this for each of the DLL files that I mentioned (LIBTIDY.DLL, LIBXML2.DLL and SQLIT3.DLL).

      Let me know what happens.

  5. Karen says:

    Wow. That search is sooo much better. I found the files. Libxml2.dll is found three other times associated with DivX program (which I plan to uninstall) and an sqlite3.dll which is found one other time in Winows/system 32 file.

    Okay, if I delete the divx programs and files, will it delete the three libxml2.dll files? And what should I do about the sqlite3.dll file? (I don’t have any sqlit3.dll files at all).

    • Now that you know where the conflicts might be, you need to work on eliminating them one at a time.

      If you are sure you are not going to use the DivX program, uninstall it and reboot. Then search for the libxml2.dll again to make sure it was removed. If it was not removed then you can rename it (don’t delete it) using Windows Explorer. After doing this, try iTunes again to see if you have fixed the problem.

      Now, if that didn’t fix the problem, find the sqlit3.dll in the Windows/System32 folder and rename it to sqlit3__.dll (if Windows will let you). Reboot and try iTunes again.

      Let me know what happens.

  6. Big City Al says:

    Thanks so much for posting this !!!!! I have tried to get apple to help me they won’t unless I pay them 70.00 and they probably don’t even know how to fix this yet ! I have been working on this problem myself for 7 hours today and could not resolve the conflict of sync server error myself. I plan on spreading the word of your great work on this solution ! I did the cmd prompt search and found libxml12.dll not in apple renamed it to libxml12_12.dll and it allowed i tunes to work again !

    • No problem, glad I could help.
      BTW, if you find that another application you have starts not working, it might be looking for the older libxml2.dll. You will need to decide what to do at that point.

      • Big City Al says:

        The libxml12.dll was dated 2007 and did not have an files listed or showing it was associated with how can a person tell it’s connection to another file? Better yet what should I do when the program that uses or programs that use this file start messing up ? Thanks again for helping out it’s people like you that make life easier.

        • What folder did you find the libxml2.dll in?
          That might give a clue as to what other program is using it.

          When a program tries to access the libxml2.dll and cannot find it, you will (or at least should) get an error saying a program cannot be found. Hopefully it will tell you the program name. Then you will need to rename it back to its original name. Yes, a pain, but until other programs get up to speed with the latest versions of these DLLs, all of us are going to suffer a bit.

          This normally doesn’t happen as it is certainly possible to have different versions of DLLs on a machine without running into this type of problem. Because we are now seeing this, it makes me think that Apple is doing something different with these DLLs in their Windows registration process. I’m sure they will sort it out and fix it in a later version of iTunes.

        • Big City Al says:

          I found libxml12.dll associated with c:\windows\system32. I hope they do fix this because there are a lot of people that are having this problem with 9.0 version of I tunes…I will not be updating anymore to new versions as this has really been a pain to fix.

      • Marcelo from Brazil says:

        THANKS SO MUCH, YOU ARE THE SOLUTION OF MY PROBLEMS

        THANK E KISS.

        • Marco says:

          Marcelo, o que funcionou para você? Tenho tentado de tudo, segui todas as digas de Charles, que é muito atencioso, e até agora, nada funcionou!

  7. Karen says:

    Well, all I can say is THANK YOU! I made the fixes and now itunes will sync my daughter’s itouch. Wow, what a lot of work to find a fix to this problem! I hope more people find your forum, I know there are alot out there. Thank you again!

  8. Scott Estes says:

    Ok, I am haivng hte same problem, but when searching for the those three files, the only two I find are LIBXML2.dll and LIBTIDY.dll.. Both are in the Apple folder, and it doesn’t find any other files.

    Please help…

  9. Umurkan says:

    Dear Charles Gates,

    When i try to search it in cmd as u what u said i have to type i am not finding any file. How is this possible can you help me with this ?

    • Umurkan,
      Make sure you are searching for each of the following files:

      • LIBTIDY.DLL
      • LIBXML2.DLL
      • SQLITE3.DLL

      Also, on the command prompt, make sure you are using the /s parameter with the DIR command. The /s command tells the DIR command to search in sub-folders. Try doing the search again and let me know what you find.

      • Umurkan says:

        I just found libxml2.dll and libtidy.dll both renamed but i did not found sqlit3.dll but i tried sqlite with a “e” sqlite3.dll and i found like 10 of them the one is in mcafee 2010 but i can not change that 1 so how would it be? Do i have to leave them or what?

      • Umurkan says:

        Never mind it worked now ! i just changed the first two i am thaking you very much ! 5 stars for you! I am happy because there are nice people in the world like you :)

  10. Umurkan says:

    There is another problem now. When i try to sync it sais yahoo go sync problem and then stops syncing. I was trying to put video’s on it.

  11. Umurkan says:

    Well I searched for it. And i found five places for it. The following maps :

    In the apple mobile device map i found 1.
    In Programfiles/Egistec/mywinlocker 3/x64
    In Programfiles/eSobi/eSobi2
    In Programfiles/Hotspot Shield/Bin
    And 1 in the windows system32 map.

    • Ok, I suspect it is the one in the Windows/System32 folder.
      Make sure you don’t have iTunes or any Yahoo mobile services running. Then, find it in Windows Explorer (or the command prompt if you are comfortable with that) and rename it to LIBEAY32__.DLL. It might not let you rename it if it is already in use so you might need to restart the computer first and then rename it.

      After that, start iTunes and try to sync your videos.
      Let me know what happens.

      • Umurkan says:

        I renamed it and it worked but now another Error happend! MobileSync :(

        • Wow this is crazy!
          Do the same search and renaming for SSLEAY32.DLL and if you find it in the Windows/System32 folder, rename it to SSLEAY32.DLL and try iTunes again.

          We will get this fixed one way or another :)

  12. Umurkan says:

    Well i found three of them.

    One again in the Hotspot folder i maby could delete that from my computer if need.
    One in system32.
    And one in The apple/mobile device support. Which should be renamed?

    • Rename the one in the Windows/System32 folder and then try iTunes again.
      I’ve got my fingers crossed that this will work. :)

      • Umurkan says:

        I did it and i got the error again! The mobile sync and after it the yahoo go Sync came. I am going to delete the hotspot now I hope it will be fixed.

      • Umurkan says:

        I have deleted them. But the same is happening again. Im getting crazy too haha :)

        • We’ve tried these:

          • LIBEAY32.dll
          • SSLEAY32.dll

          Now let’s try looking for these:

          • LIBCURL.dll
          • DeviceLink.dll
          • GoogleContactSync.dll
          • iSyncConduit.dll
          • iTunesMobileDevice.dll
          • MobileDevice.dll
          • SyncServices.dll
          • SyncServicesUI.dll
          • SyncUICore.dll
          • SyncUIHandlerDLL.dll

          If you find any of these in the Windows\System32 folder, rename them (don’t delete them). You can just change the file extension to .OLD if you want.

          Oh yeah, and don’t forget the restart the computer after renaming the files. You want to make sure Windows isn’t still holding on to these files in memory.

          Let me know if this works.

  13. Umurkan says:

    Nice list :) I am trying them now!

  14. Umurkan says:

    Well, I searched them all but i didn’t find any in the system32 folder. And now?

  15. Serhan says:

    Excellent work Charles

    But in this kinda situation i’m gonna take the lazy man’s way out.

    Uninstall blasted 9.1 and reinstall 9.0

    Good thing i kept a backup of that :p

  16. [...] This post was mentioned on Twitter by Kevin Joyner. Kevin Joyner said: Hmmm. So Apple have broken iPhone sync in iTunes. Inconvenience compounded by the need to trawl Google for answers ( http://ow.ly/1y8QG ) [...]

  17. guthriea says:

    THANK YOU!!!!!!!

  18. Thanks, this solved my problem. Let me guess, your development software is UltraEdit-32?

    • Glad it worked for you.
      The development software that was conflicting was my Embarcadero (CodeGear) RAD Studio 2010.

      On thing you will need to keep in mind is that your development software probably needs the older version of the DLL that you renamed, as mine does. When it can’t find the correct DLL, it now fails to load some of its design time packages. I just wrote a little batch file I use on startup of the RAD Studio to rename the file back to its original name and then back again when the software quits. A pain yes, but you gotta do what you gotta do. :)

  19. matthew says:

    i found the files SQLITE3.DLL 3 of them, but how do i rename them? please help, this is driving me crazy.

    thank you

  20. matthew says:

    I think its in the apple support file.

  21. matthew says:

    Im sorry I have no idea what I am doing, I located the files in the CMD when I did a search. I have looked in the system32 file and found nothing.

    • Ok, you know how to do the DIR command to search for the files, so I’m going to change the command a little.

      I want you to do the DIR command again, but this time it will look like this:

      dir sqlite3.dll /s > files.txt

      Doing it with the > files.txt will cause the results to go to a file called “files.txt”.
      Next, type the word explorer . and press enter.
      This will open Windows Explorer in that same folder.

      Find the file “files.txt” and email it to me at cgatesmobile@gmail.com.
      I’ll take a look at the results and get back to you with what to do.

  22. matthew says:

    Hello Charles,

    I have searched for these files but i cannot locate them in the system32 folder, is there somewhere else i should be looking, also i am using the latest vista.

    thank you

  23. matthew says:

    Thank you for your help, but this did not work, it’s giving a message:

    Starting…
    Could not find file: C:\Program Files\iTunes\iTunes.exe
    Running command with: C:\Program Files (x86)\iTunes\iTunes.exe
    Waiting 15 seconds for exit…
    Done!

  24. matthew says:

    Also, I have located the two files in the apple folder.

  25. bahar kim says:

    thank you very much charles.
    now i can sync my iphone after 2 weeks googling.
    i even go to apple genius lab, ask the IT to help my problem.. but all they gave me only how to uninstall and install properly and that not even close fixing my syncserver problem.. i hope other iphone user that have the same problem found your web.
    but i have another problem after changing the SQLITE3.DLL on the mozilla folder, now i cannot open my mozilla firefox :(
    i have to change it back to use my mozilla.. and i have to change it back if i want to sync my iphone..

    any idea ?

    • bahar,

      The SQLITE3.DLL that Apple is using should be located in the “C:\Program Files (x86)\Common Files\Apple\Apple Application Support” folder. This is a DLL that other software uses but is controlled by Apple, because they wrote the code for it. It seems that they do not inform other vendors when the update the program. In this case, they changed the interface to the program (I think they removed one or more entry points into the DLL). Unfortunately, this means that other programs that use the DLL will now stop working. Apple didn’t consider this in their release of iTunes 9.1; there has been a great impact on people all around the world.

      What is the date/time stamp on the SQLITE3.DLL in the mozilla folder?
      Undoubtedly it is a different version of the program.

      The current Apple version is 3.6.12.74 and has a date/time stamp of 3/15/2010 4:57 PM.
      You can find this information by right-clicking on the DLL and selecting the Properties menu item. Then go to the Details tab to find the version info.
      I posted an image of the version here: http://picasaweb.google.com/lh/photo/lFulnNZRrIV2CzXp6C7now?feat=directlink

      You might also check to see if there is an updated Firefox. Maybe they have the latest DLL version in an update.

      • Bahar Kim says:

        i already solve the problem
        i change the SQLITE3.DLL in the C:\Windows\System32 became SQLITE3.DLL.BAK

        then SQLITE3.DLL in the mozilla firefox i change it back to normal..

        now i have no problem at all.
        my uncle said, the problem is SQLITE3.DLL at the C:\Windows\System32
        because every information is from windows\system32

        i dont really understand, but i work perfectly now..

        thanks for sharing this information.

  26. Jat says:

    Hi I tried teh Itunes Com Fix it, but i get this error:

    Starting…
    Running command with: C:\Program Files\iTunes\iTunes.exe
    Waiting 15 seconds for exit…
    Done!

    Failed to get ProgramFilesx64 environment variable.

    I also tried to change the files sqlite.dll I got seven hits, but they don’t let me change them in the mcfee/siteadvisor folder…. here are my hits:

    C:\>dir sqlite3.dll /s
    El volumen de la unidad C es ACER
    El número de serie del volumen es: 240E-99D1

    Directorio de C:\Program Files\Common Files\Apple\Apple Application Support

    03/15/2010 04:57 PM 406,816 SQLite3.dll
    1 archivos 406,816 bytes

    Directorio de C:\Program Files\Common Files\Mcafee\MSC

    03/31/2010 06:19 PM 456,392 sqlite3.dll
    1 archivos 456,392 bytes

    Directorio de C:\Program Files\Common Files\Nokia\MPlatform

    02/03/2010 08:33 AM 362,029 sqlite3.dll
    1 archivos 362,029 bytes

    Directorio de C:\Program Files\McAfee\MPS

    02/25/2010 06:08 PM 435,520 sqlite3.dll
    1 archivos 435,520 bytes

    Directorio de C:\Program Files\McAfee\SiteAdvisor

    12/08/2009 02:38 PM 435,520 sqlite3.dll
    1 archivos 435,520 bytes

    Directorio de C:\Program Files\Mozilla Firefox

    04/03/2010 10:07 PM 458,200 sqlite3.dll
    1 archivos 458,200 bytes

    Directorio de C:\Users\Administrator\AppData\Roaming\LimeWire\browser\xulrunner

    01/02/2010 03:04 PM 409,600 sqlite3.dll
    1 archivos 409,600 bytes

    Total de archivos en la lista:
    7 archivos 2,964,077 bytes
    0 dirs 54,325,092,352 bytes libres

    C:\>cd \

    any suggestions??? I did manage to change the limewire archive,

    • Jat,
      Disable your mcafee anti-virus and try running iTunes again. I suspect the version of SQLITE3 that it uses is causing the problem. If that doesn’t work, the next to try is the SQLITE3 used by FireFox.

      Remember to turn your anti-virus back on.
      Good luck.

      – Charles

      • Jat says:

        Thanks for the quick response!

        Ok, I tried everything on this post and the summary… nada. I even went as far as to desinstall firefox, and nothing. I disabled McAfee, and nothing. Itunes 9.2, by the way continues to give me the same error. The worst part is that I was in the middle of updating my Iphone to Ios 4 when this happened…. What now? I copied the two files from the apple application file into the mobilehelp file also.

        • Jat says:

          wait wait… I forgot to check out the lbixml2.dll files I just got 8 hits let’s see what’s up… here they are:

          C:\Users\Administrator>cd |
          La sintaxis del comando no es correcta.

          C:\Users\Administrator>cd \

          C:\>dir libtidy.dll /s
          El volumen de la unidad C es ACER
          El número de serie del volumen es: 240E-99D1

          Directorio de C:\Program Files\Common Files\Apple\Apple Application Support

          06/03/2010 01:45 PM 324,896 libtidy.dll
          1 archivos 324,896 bytes

          Directorio de C:\Program Files\Common Files\Apple\Mobile Device Support

          06/03/2010 01:45 PM 324,896 libtidy.dll
          1 archivos 324,896 bytes

          Total de archivos en la lista:
          2 archivos 649,792 bytes
          0 dirs 54,227,791,872 bytes libres

          C:\>dir libxml2.dll /s
          El volumen de la unidad C es ACER
          El número de serie del volumen es: 240E-99D1

          Directorio de C:\Program Files\Common Files\Apple\Apple Application Support

          03/15/2010 04:57 PM 1,241,376 libxml2.dll
          1 archivos 1,241,376 bytes

          Directorio de C:\Program Files\Common Files\Apple\Mobile Device Support

          03/15/2010 04:57 PM 1,241,376 libxml2.dll
          1 archivos 1,241,376 bytes

          Directorio de C:\Program Files\Common Files\Nokia\Service Layer\A

          08/06/2005 02:22 PM 898,560 libxml2.dll
          1 archivos 898,560 bytes

          Directorio de C:\Program Files\Common Files\Nokia\Service Layer\A\Service Modul
          es\ServiceModule_00001

          07/10/2008 02:33 PM 898,560 libxml2.dll
          1 archivos 898,560 bytes

          Directorio de C:\Program Files\DivX\DivX Content Uploader

          09/28/2007 01:53 PM 845,824 libxml2.dll
          1 archivos 845,824 bytes

          Directorio de C:\Program Files\DivX\DivX Converter Mobile

          12/26/2007 03:19 PM 895,488 libxml2.dll
          1 archivos 895,488 bytes

          Directorio de C:\Program Files\DivX\DivX Player

          09/28/2007 01:56 PM 845,824 libxml2.dll
          1 archivos 845,824 bytes

          Directorio de C:\Windows

          11/28/2003 06:06 PM 743,424 libxml2.dll
          1 archivos 743,424 bytes

          Total de archivos en la lista:
          8 archivos 7,610,432 bytes
          0 dirs 54,228,852,736 bytes libres

        • Start with the LIBXML2.DLL in the C:\Windows folder. Rename it to LIBXML2.OLD or something like that.
          If that doesn’t work, then try the ones that are used by Nokia.

          Keep in mind that if you rename DLLs, the programs that use them will stop working.

          Also, check your environment PATH variable and make sure all of the Apple folders are listed, and that they are listed before any of the other folders where you found these DLLs.

          Gotta get some sleep now. ;-)

  27. Jat says:

    Nope… I did them all, and nothing… I don’t how to check the enviroment path, heck to be forthright, I don’t know what that is.

    I guess you’re right about the sleep thing. I’ll try tomorrow again. See if something new has come up. Thanks again.

  28. IGOR says:

    Boa noite Charles Gates!

    Estava lendo o site ” http://cgatesmobile.wordpress.com/2010/04/02/itunes-syncserver-exe-error/ ” onde você resolveu um problema no ITUNES 9.1.

    Um problema parecido está ocorrendo com muitas pessoas no ITUNES 9.2 , o ITUNES 9.2 é essencial para rodar a nova firmware IOS 4.0.

    Uso o WINDOWS XP e sempre que sincronizo meu ipod touch, os seguintes erros aparecem:

    “O Syncserver encontrou um erro e precisa ser fechado”

    AppName: syncserver.exe AppVer: 17.641.8.1 ModName: corefoundation.dll
    ModVer: 1.550.26.13 Offset: 00043dd9

    ——————————————————————————————————————————-

    “O Mobiledevicehelper encontrou um erro e precisa ser fechado”

    AppName: applemobiledevicehelper.exe AppVer: 17.758.0.68 ModName: corefoundation.dll
    ModVer: 1.550.26.13 Offset: 00043dd9

    ————————————————————————————————————————————————

    “O itunes não pode carregar as informações de dataclass dos serviços de sincronização. Conecte novamente e outra vez mais tarde”

    POR FAVOR, NOS AJUDE!

    PLEASE, HELP US!

  29. Marco says:

    Dear Mr. Gates, Its the second Iphone 3gs 32gb unit I try to syncronize in windows XP using Itunes 9.2 (all of them Brazilian portuguese versions). The binary fortress tool did not help, nor any of previous advices. I found SQLITE3.DLL on Firefox and added the extension OLD on it. Now Firefox 3.6. does not run. I also found LIBXM12.dll at common files in NERO folder and also renamed it as .OLD. Nero Smart Start works OK. I did not try any other tools of my Nero 8 version.

    Itunes sees my Iphone but Syncserver problem still happen and I cannot backup, nor syncronize, nor update no Iphone 4.0 software. My Syncserver is version 3.1.0.0 (17.641.8.1).

    It also crashes MDCRASREPORTTOLL.exe.

    While trying to sync my double core Intel works at full load (100%).

    My wife’s IPOD touch 3g 32gb experience the same problem.

    Nobody at Apple store knows anything about it.

    Both Apple devices used to sync with previous version of Itunes.

    Both Apple devices have less the 5 days of purchase.

    I loved Apple for 2 days and now I hate it!

    What I’m I suppose to do?

    Please help me out.

    Rgds.,

    Marco

    • Marco,
      When SynServer stops working, does Windows give you the option to “send” information? If it does, look at the details of the report that will be sent. What we need to find is the actual DLL that is causing the problem. SyncServer.exe calls DLLs to do it’s work and the problem usually is an incorrect DLL version is found. If you can get that DLL name then we should be able to figure out how to fix it.

      • Marco says:

        Mr. gates, As requested bellow you can find the 3 messages I got. They are not in the same order I got them. I’ll posto one at once:

        FIRST:

      • Marco says:

        I past from an Apple discussion post. Its exactlly what happen to me:

        This is what happens when I plug my iPod while iTunes 9.2 is running:

        * Device detected, iPod is shown on devices list.
        * “SyncServer has stopped working.”
        * “MobileDeviceHelper has stopped working.”
        * “iTunes was unable to load dataclass information from Sync Services. Reconnect or try again later.”

        And this is what happens when I try to update to iOS4.

        * Click “Update” button…extracting software…backing up (“iPod name”).
        * “MobileBackup has stopped working.”
        * “iTunes could not backup the iPod (“iPod name”) because the backup session failed.”
        * “iTunes could not backup the iPod (“iPod name”) because the backup session failed. Please disconnect and reconnect the iPod, then try again.
        * “MDCrashReportTool has stopped working.”

        Couldn’t update to iOS4.
        I have a 32GB Iphone 3gs 3.1.3
        Running Windows XP Pro.

  30. Igor says:

    Já segui todas as orientações acima e nada! O iTunes 9.2 continua com os erros! Vou desistir e esperar uma atualização da Apple .

  31. Oliver says:

    Hi Charles,

    this seems to be my last hope. After updating to iTunes 9.2 I can’t sync my iphone anylonger. iTunes just not recognize when I plug in the phone (somehow it does at iTunes opens). When stopping the AppleMobileDevice service and replugging the phone iTunes complains that it could not sync due to the stopped service…
    So – iTunes recognizes somehow that there is a phone but will not show it in the left hand device section.

    I tried the above described *.dll search and found sqllite.dll twice. One in apple folder and one in firefox folder. But unfortunately renaming the firefox one did not solve my issue…

    Thanks for reply,
    Oliver

  32. Marcelo Baida says:

    Dear friend:
    I have a little problem with the new version of Itunes
    Some things ( like “iTunes SyncServer.exe Error” ) I could fix thanks to your contribution on this page .
    But the problems do not end there .
    When i try to sync, the Itunes stopt work and i must close the program , becouse is not responding
    Can you help me ?
    Sorry ..my english es un poco malo.

    • Hi, I’m on vacation right now so won’t be able to get Internet access much. Recently, someone posted that they had to change their time zone on their computer so the European zone and restart iTunes to get it to work. You might try that to see if it will work. Let me know if that works for you.

      – Charles

  33. Doron Neumann says:

    Happened to me too. At the end, the only thing that solved it was to change my Time Zone windows settings to another time zone (with the same offset).
    I am in Israel time zone and changed to some European time zone.
    When I did it and restarted iTunes, all of these sync issues when away.
    This is something new that began when I upgraded to iTunes 9.2

    • Doron, this is some great information. What made you think to change the time zone? Have you tried changing it back to see if iTunes still works?

    • Eli A.C. says:

      Hi, I am also from Israel. Doron you are dam right !!! It did fix the bug. These geniouses from apple did a real mess and you find it. They should offer you a job and fire some idiots over there.
      Thank you again to you and to mr. Gates for this great forum.

  34. Deb says:

    Thank you very much. After hours and hours of searching and several attempts to fix the sync problem after installing I-Tunes 9.2 we happened across your site. It was the incorrect time zone causing all the problems!

  35. Marco says:

    Does anyone double check the time zone solution? Is it really working with Itunes 9.2 and Iphone 3Gs?

  36. Thiago says:

    Hi,
    I found the solving for the problems with iTunes 9.2 on Apple Forum.
    It´s a problema with the Time Zone. The Time Zone must be the same on PC and on the iPhone.
    I changed the Time Zone of my iPhone (was configurated to Rio de Janeiro and my computer was configurated to Brasília). After change the Time Zone to Brasília in my iPhone everything start to work just fine!

  37. Marco says:

    DOes it solve ALL Itunes 9.2 synch problems on windows?

  38. Marco says:

    Oh my God. I tried change time zone on both ends to Brasilia (before it was Brasilia on desktop and Rio de Janeiro on mobile devices). The very hated and well know issues happened. Several error messages (same as before) appeared when I connected Ipode touch 3g. It’s updating to IOS 4 anyway. I’ll give you a follow up on this. I hope that AFTER update it get solved. I’ll let you know.

    • Hey Marco,
      I really hope it works for you! Let me know.
      I was also thinking that you might try manually deleting the backup files that iTunes is storing for your devices. Those files might be causing problems because they have the wrong time zone.
      – Charles

      • Marco says:

        I’m sorry. I deleted the backup files, but the behavior is the very same! Any other sugestion? PS. not only I changed time zone, deleted old backup files, but also, suspended Kaspersky.

  39. Marco says:

    Forget it. Doesn’t work. The very same sequence of recurring error mesages keep poping up. I thought I would upgrade when I gave up my almost 7 years of Windows mobile, but Apple doesn’t know how to write decent software. If this was Microsoft all of a sudden a new patch would come to streets. Beautifull face, but be carefull, protect yourself.

    • Marco says:

      Charles, do you believe this just released Itunes 9.2.1 will fix this issue?

      • Marco,
        Here’s what they say they fixed:
        iTunes 9.2.1 provides a number of important bug fixes, including:

        • Disables older versions of some incompatible third-party plug-ins
        • Addresses minor issues with dragging and dropping items
        • Addresses a performance issue when first syncing to some devices with iTunes 9.2
        • Addresses an issue upgrading to iOS 4 on an iPhone or iPod touch with encrypted back-ups
        • Addresses other issues that improve stability and performance

        This description of their changes is very vague, but does make me believe they were aware of the problem and are attempting to fix it.
        Their KB article on this is at: http://support.apple.com/kb/DL1056

        I have not installed this update myself. I am getting ready to install Windows 7 on my machine and the installer is recommending that I uninstall iTunes first. I’m scared to do that but will anyway very soon.
        If you install this update let me know how it goes.
        – Charles

        • Marco says:

          Tks. Yes, I read the release notes and they are really vague. I cannot download it now and install because I’m affraid it asks to reboot and I’m on a 6Tb files move and cannot stop it. Eventually I’ll update and let you know. Rgds. Marco

  40. Jose says:

    Man, you don’t know how helpfull you were. Thank you so much. You are doing something that apple should have done. You saved my life, thank you so much.

  41. César says:

    Hello Charls
    I have been reading everything about the sync and I cant do it.I have found the files you say,in c, common files…apple and I have found those 3.I rename them and I still have the same problem
    PLEASE could you help me?
    Thanks

  42. Yordis says:

    Hey i Fixed this bug by my self.. ;)

    1- I Re-installed WinXP ..
    2- Installed PC Drivers..
    3- Downloaded iTunes 9.2 (NOT THE 9.2.1 Version)
    4- Then my iTunes started working again :D

    I dont KNOW if this would help you.. but i did for me .. just give it a try..

    **Sorry for my english.. im from dominican republic.

  43. gutty says:

    hi Charles,
    I have the same sync problem while starting the backup… in itunes version 10:SyncServer has encountered a problem and needs to close. We are sorry for the inconvenience.

    in the details: AppName: syncserver.exe AppVer: 17.641.10.23 ModName: corefoundation.dll
    ModVer: 1.550.36.0 Offset: 00043df7

    i searched and deleted the 3 DLL you mention besides in the apple path; and the problems continues, (tryed also the timezone idea) any other idea?

    • Have you installed any applications on your device that have not yet been synchronized? If so, it could be a bad install for one of those apps. Disable the synchronization of apps and then try syncing again. If that works, enable app sync and synchronize again. If that doesn’t work, try restoring from your last backup.

      – Charles

  44. Daniel says:

    I was having iTunes9 and experienced “itunes was unable to load data class information from sync services for itunes 10″. I have tried several methods to resolve it:-
    1. Checked & removed DLL files
    2. Timezone method
    3. Reset Sycn history from iTunes
    4. Many other methods mentioned in the web. But the last action was to install Tunes10.0.1.22
    5. I tried with another iPhone and it also has the same error.
    5. I installed iTunes on another PC and it works perfectly for both iPhones

    However, as the laptop that has error is my main working machine, I need to resolve this desperately.
    I looked at some old logs and noticed that “AppleMobileDeviceHelper.exe” and “SyncServer.exe” did not start.

    • From the iTunes help menu, select “Run Diagnostics” and make sure the “Device connectivity tests” and “Device sync tests” options are checked. In the test results, make sure the time and time zone settings that iTunes reports match your computer’s settings. This seems to be the most common problem with the latest versions. If you find a difference, set your computer to what iTunes thinks the time AND time zone are for your device (or correct them on your device and re-run the test).

  45. Ronen says:

    Greets all,
    I’m using latest iTunes with iPad (all new from today). My sync error problems were solved when I changed the TimeZone from Jerusalem to some other GMT+2 one. Unreal…. but works.

  46. Daniel says:

    I performed the “Run Diagnostics” and the time seems okay. When I change to another timezone, I restarted iTune and “Run Diagnostics” again, the time was updated correctly. See below for the logs

    >>>>> Start of “Run Diagnostics” <<<<>>>> End of “Run Diagnostics” <<<<<

    One other observation is that iTunes took a long time to load. When loaded, inside the iTunes Info Tab, the settings in "Sync Contacts", "Sync Calendars" .. are empty

  47. Daniel says:

    I performed the “Run Diagnostics” and the time seems okay. When I change to another timezone, I restarted iTune and “Run Diagnostics” again, the time was updated correctly.

    One other observation is that iTunes took a long time to load. When loaded, inside the iTunes Info Tab, the settings in “Sync Contacts”, “Sync Calendars” .. are empty

    See below for the logs:-

    Microsoft Windows XP Professional Service Pack 3 (Build 2600)
    Dell Inc. Latitude D610
    iTunes 10.0.1.22
    QuickTime 7.6.8
    FairPlay 1.9.16
    Apple Application Support 1.3.2
    iPod Updater Library 10.0d2
    CD Driver 2.2.0.1
    CD Driver DLL 2.1.1.1
    Apple Mobile Device 3.2.0.47
    Apple Mobile Device Driver 1.49.0.0
    Bonjour 2.0.3.0 (214.3)
    Gracenote SDK 1.7.1.420
    Gracenote MusicID 1.7.1.78
    Gracenote Submit 1.7.1.106

    iTunes Serial Number F2F4E44D32F89AE9

    Current user is an administrator.
    The current local date and time is 2010-09-28 14:38:41.
    iTunes is not running in safe mode.
    WebKit accelerated compositing is enabled.
    HDCP is not supported.

    Video Display Information

    Mobile Intel(R) 915GM/GMS,910GML Express Chipset Family
    Mobile Intel(R) 915GM/GMS,910GML Express Chipset Family

    **** External Plug-ins Information ****

    No external plug-ins installed.

    **** Network Connectivity Tests ****

    Network Adapter Information

    Adapter Name: {EC9D7610-420A-4D7F-A1C4-FCCF37FC4C1D}
    Description: Intel(R) PRO/Wireless 2200BG Network Connection – Packet Scheduler Miniport
    IP Address: 192.168.1.64
    Subnet Mask: 255.255.255.0
    Default Gateway: 192.168.1.254
    DHCP Enabled: Yes
    DHCP Server: 192.168.1.254
    Lease Obtained: Tue Sep 28 14:21:12 2010

    Lease Expires: Wed Sep 29 14:21:12 2010

    DNS Servers: 192.168.1.254

    Adapter Name: {D02F7B9B-EBD0-4841-8A0E-EC2F140DF865}
    Description: Broadcom NetXtreme 57xx Gigabit Controller – Packet Scheduler Miniport
    IP Address: 0.0.0.0
    Subnet Mask: 0.0.0.0
    Default Gateway:
    DHCP Enabled: No
    DHCP Server: 255.255.255.255
    Lease Obtained: Thu Jan 01 08:00:00 1970

    Lease Expires: Thu Jan 01 08:00:00 1970

    DNS Servers: 172.16.1.51
    172.16.1.52

    Active Connection: LAN Connection
    Connected: Yes
    Online: Yes
    Using Modem: No
    Using LAN: Yes
    Using Proxy: No
    SSL 3.0 Support: Enabled
    TLS 1.0 Support: Enabled

    Firewall Information

    Connection attempt to Apple website was successful.
    Connection attempt to browsing iTunes Store was successful.
    Connection attempt to purchasing from iTunes Store was successful.
    Connection attempt to iPhone activation server was successful.
    Connection attempt to firmware update server was successful.
    Last successful store access was 2010-09-26 15:18:59.

    **** CD/DVD Drive Tests ****

    No drivers in LowerFilters.
    UpperFilters: GEARAspiWDM (2.2.0.1),

    F: PHILIPS CDRW/DVD SCB5265, Rev TD15
    Data or MP3 CD in drive.
    Found 1 songs on CD, playing time 99:59 on CDROM media.
    Track 1, start time 00:00:00
    Get drive speed succeeded.
    The drive CDR speeds are: 4.
    The drive CDRW speeds are: 4.

    **** Device Connectivity Tests ****

    iPodService 10.0.1.22 is currently running.
    iTunesHelper 10.0.1.22 is currently running.
    Apple Mobile Device service 3.2.0.0 is currently running.

    Universal Serial Bus Controllers:

    Intel(R) 82801FB/FBM USB Universal Host Controller – 2658. Device is working properly.
    Intel(R) 82801FB/FBM USB Universal Host Controller – 2659. Device is working properly.
    Intel(R) 82801FB/FBM USB Universal Host Controller – 265A. Device is working properly.
    Intel(R) 82801FB/FBM USB Universal Host Controller – 265B. Device is working properly.
    Intel(R) 82801FB/FBM USB2 Enhanced Host Controller – 265C. Device is working properly.

    No FireWire (IEEE 1394) Host Controller found.

    Connected Device Information:

    iPhone-Daniel, iPhone 3GS running firmware version 4.0.1
    Serial Number: 88012ZX83NP

    **** Device Sync Tests ****

    Sync tests completed successfully.

  48. Gal says:

    Well guys those things are as dumb as it gets! I managed to fix those problems after hours of searching by simply doing one small idiotic thing – checking the “automatically change time zone” in the computer time zone options!

    Funny or sad – you to decide…

    All the best and good luck!

  49. Frota says:

    Hi! I´m from Brazil and I don´t speak English very well…sorry about my English…
    I was very dissapointed about my phone because the SYNC SERVER ERROR…tried everything…
    Renaming the files didn´t work, but the update in Binary Fortress DID THE TRICK! THANKS A LOT!!!

  50. Carlos says:

    Hi Charles!
    first: sorry about my poor english!

    second: I use version itunes 10 , I have searched all the dlls from the cmd, but only found one of each in the “apple” folder, not repeated in any other way.
    My Iphone3 continues with “syncserver.exe” and “movildevicehelper.exe” errors when I connect the USB cable…

    Thank you very much in advance for any concideracion.

    • Carlos,
      The problem is most likely related your daylight savings time setting. Go into your clock settings and make sure the time zone is correct and matches the zone your apple device is set to. Then look at the daylight savings time option and, if on turn it off. Restart the computer and try to sync again. If this does not work, try changing the time zone to a different zone, but make sure whatever zone you choose, your apple device is set to the same zone.

      Hope this helps.
      Charles

    • carlos says:

      hi charles!Review which tells me, and everything worked fine. Thank you very much!

      Best regards!

  51. Bruce Gintoft says:

    I have been getting, “SyncServer has encountered an error and needs to close” error. Is this the same error that you describe? I have the latest iTunes and Mobile Me Control panel downloaded, again with the help of a Mobile Me Lead Technician. We found that the Control Panel for Mobile Me, on the sync tab, has the Calendars option grayed out. What he helped me do was create a new User Id on Windows XP Professional and try syncing on that new Id. It worked, so he said the problem now lies in Windows and I should call them. I think I could try your solution first. Do you recommend that? Step by step, what shall I do?

  52. Bruce Gintoft says:

    Here is what I found in my search for the files you mention above. If you want to take this offline and contact me personally, that is fine.

    I found 5 iterations of sqlite3.dll:
    1. In Apple.
    2. C:\Program Files\HP\Digital Imaging\smart web printing\MozillaAdd0n3\xre\components.
    3. C:\Program Files\iolo\Common\lib.
    4. C\Program Files\Mozilla Firefox.
    5. C:\Program Files\Spybot – Search & Destroy.

    I am sure these programs are used frequently, except for Spybot, which I have used occasionally.

    Recommendations?
    Bruce

    • Bruce,
      Before you go any further with the file checking, try resetting your computer time zone to something different and then set it back to the correct time zone. Most people are finding that this is actually a time zone problem rather than a file version problem.
      Give it a try and let me know if that works for you.
      You can email me directly if you would rather.
      –Charles

  53. Bruce Gintoft says:

    I did try to reset my time zone on the laptop. It did not work for me. But, maybe, I did not follow proper steps in doing this. Can you list the steps?
    Bruce

  54. Bruce Gintoft says:

    Charles,
    I have also found that when the SyncServer error appears and it asks me to send an error report to Microsoft, the module that is having the error is objc.dll.

  55. Bruce Gintoft says:

    I found out the problem has to do with a corrupt SyncService folder under my User Id in Windows. I simply renamed the folder (per your instructions)to something else. Then, I connected my phone while in ITunes and the SyncServer error message went away. Thanks for your advice, young man!

  56. ivanstok says:

    Hi I have itunes 9.2 but not synchronize my ipod touch
    I search all files
    * libeay32.dll
    * ssleay32.dll ssleay32.dll
    * libcurl.dll libcurl.dll
    * DeviceLink.dll DeviceLink.dll
    * GoogleContactSync.dll GoogleContactSync.dll
    * iSyncConduit.dll iSyncConduit.dll
    * iTunesMobileDevice.dll iTunesMobileDevice.dll
    * MobileDevice.dll MobileDevice.dll
    * SyncServices.dll SyncServices.dll
    * SyncServicesUI.dll SyncServicesUI.dll
    * SyncUICore.dll SyncUICore.dll
    * SyncUIHandlerDLL.dll SyncUIHandlerDLL.dll
    * libtidy.dll
    * sqlite3.dll
    * libxml2.dll
    i only found sqlite3.dll duplicate and rename, but don’t found libxml2.dll

    what can i do?

  57. Pedro says:

    Hi Guys, maybe you can try this way, very easy: just go to windows clock and uncheck (or check) the (I don’t know the exact words in English cause my Windows is in Portuguese) “daylight saving”, I guess. You might have to do it a couple times, and of course I have no idea of how it works, but it does, even though I sounds very stupid. Good Luck!

    • zero_cor says:

      Hi to all, solve the problem as pedro said, leaving in the hourly zone check “to change the hour automatic according to the summer schedule”
      Thx Pedro
      Good luck all… <("”)>

  58. Bipu says:

    Dear Mr.Gates,

    I am getting three types of error in my new itunes 10.2.2
    1. Sync Server Error [corefoundation.dll Problem]
    2. Mobile Device Helper error[corefoundation.dll Problem]
    3. MD Crash Report Tool error [Corefoundation.dll]

    and lastly itunes shows a dialog box with this text “itunes was unable to load data class information from sync services. Reconnect or try again later”

    I have tried all your solution written here nothing seems to be working. Could you please help me.

    • Bipu says:

      Well if i search for the CoreFoundation.dll file from dos search option then it shows “File not found” but the file is in c:\programfiles\commonfiles\Apple\Apple Application Support
      i am sure i spelled it correctly but why it is showing that “File not found”. I am eagerly waiting for your reply.

      • I have one solution that I have not described on the blog yet.
        Assuming you have Windows Vista or 7, try this:
        1. Unplug iPhone
        2. rename the SyncServices folder found at C:\Users\\AppData\Roaming\Apple Computer to SyncServices_Old
        3. reconnect iPhone

        You might need to reboot the computer before doing step 2.

        If you do not have Vista or Win 7, search for the SyncServices folder and follow the same steps.
        Let me know if this works for you.

        • MMusashi says:

          I have the same problem as Bipu, on win xp, but unfortunately your suggestion to rename SyncServices dir didn’t help.
          I do have C:\Program Files\Common Files\Apple\Apple Application Support\CoreFoundation.dll on my pc.

          I am also a developer and have several instances of the dll files you mentioned (used by firefox, gimp, ditto, xampp and more).

          Is there no solution other than renaming those dlls? obviously when I rename them, the apps that need them are not working properly anymore, and I need them for my work..

          I have iPhone 4.2.1 and iTunes 10.2.2.12

          Why Apple is not solving this ???

        • If you have not tried the time zone fix, try that first before renaming any dlls.
          I also could not rename the dlls because I needed them for my work as well. I was eventually forced to have iTunes on a computer that did not have any of my development software installed. So far, there is no real solution to the rename dlls solution. That was just to determine if the problem was a dll conflict. You might also be forced to put iTunes on a different computer. Apple has not addressed this problem. They control the dlls and do not have control over how other developers use them. The problem is that the other developers do not keep up with the latest dll versions.

        • MMusashi says:

          Thanks for your prompt response !
          The timezone on my pc and iphone are the same, so I guess the tz fix won’t help?

          I managed to sync to my home pc, but I need my contacts and calendar from my work pc…

          I have the latest versions of all the programs I mentioned above, and they do not collide with each over, only iTunes does.

          You think that Apple knows about this issue? it seems rather big issue.

        • I think Apple knows about it but since they control the dlls I’m not sure they care. I’ve never seen any sort of official fix for the problem.
          The only other thing I can think of on your work pc is to uninstall everything Apple, including the Mobile Me control panel if you have it installed, reboot, then reinstall everything.

        • MMusashi says:

          Thanks again for your suggestions.
          I tried it, uninstalled everything Apple, reboot and reinstall, but no avail :-(

          I hope someone at Apple is reading this and knows they have one unhappy customer..

        • MMusashi says:

          I can’t believe it !!
          The timezone fix helped me too :-)
          I had 2 timezones with my city name on my win xp machine due to a tweak of the IT guys at the office.
          I changed to a different city within the same tz and it syncs now !!
          Changing back to my original tz keeps the sync ok.

          Thank you sooooooo much !

  59. Bipu says:

    Dear Mr.Gates,

    it seems all my problems is solved after changing my time zone both in iphone & Computer…thanks a lot man…you are great..it’s impossible to imagine that changing the time zone could solve this problem. But one more question to you if i go back to my original timezone will the problem arise again? if arises then how to solve that cause all my outlook meetings are in this computer..so changing the timezone will affect me a lot.

    • Once the problem is solved with the time zone, you should be able to change back to the original zone on both devices without having any problems.

      • bipu says:

        Though changing timezone solve my problem..but if i change back to my original timezone then again the syncserver.exe error comes up. Do you have any other solution?

        • Did you see the last comment I sent you? Here it is again:

          I have one solution that I have not described on the blog yet.
          Assuming you have Windows Vista or 7, try this:
          1. Unplug iPhone
          2. rename the SyncServices folder found at C:\Users\\AppData\Roaming\Apple Computer to SyncServices_Old
          3. reconnect iPhone

          You might need to reboot the computer before doing step 2.

          If you do not have Vista or Win 7, search for the SyncServices folder and follow the same steps.
          Let me know if this works for you.

  60. Bruce says:

    Remember, Charles, this was the solution I used to correct the error. I just renamed that folder (see my Jan 24, 2011 post) as you instructed. It also works for Windows XP. You are a Godsend! The problem was eliminated and did not return.

    • Hi Bruce,
      Yes, I was trying to relay this solution. The problem is that I’ve never posted it to the blog so not many people know about it. You should be the one getting the credit for this because you were so diligent in trying all proposed solutions!
      God Bless!

  61. patrick devoy says:

    Charles Gates… thanks a bunch
    yep
    me too. libxml2.dll……one from Apple and another from NERO…..(yuck). i renamed the one from nero to .old and copied the one from apple the the nero folder. everything works great
    again…..thanks Charles

  62. Nacho says:

    Hi Charles!!
    THANK YOU VERY MUCH FOR YOUR HELP!!!

    After reading the whole thread and trying renaming all the dll’s, I found your new post saying to renamy the SyncServices folder.

    Doing that, the two errors stopped (SyncServer and MobileDeviceHelper), but the new error I got instead was the one regarding MobileBackup.

    So I went to your other thread (http://cgatesmobile.wordpress.com/2010/07/04/itunes-and-your-time-zone/), changed timezone to GMT-3 Buenos Aires (I was in GMT-3 Montevideo)and PROBLEM SOLVED!!!

    So I turned back the dll’s names to the original ones and no problem at all.

    The only thing now is that I cannot go back to GMT-3 Montevideo. Any other timezone will work, just not the correct one: Montevideo.

    Could you please you help me on this one too?

    Thanks again for your the help you give everyone.

    Regards,
    Nacho

    • Nacho says:

      Sorry, maybe I should have posted this one on the timezone thread?

      Please advice. Thanks!

    • Nacho says:

      hi!! PROBLEM SOLVED!!

      I selected my correct timezone again (GMT-3 Montevideo) and clicked the box “Automatically adjust clock for daylight saving changes”.

      Just that and on the road!
      Thanks again!

  63. Olga says:

    Hi Charles! having all the way the same problem with my new ipohe4 (prevoisly had iphone3g). i want to get my contacts and stuff to my new ipone but itunes says there is a problem with syncserver, mobiledevicehelper, mobilebackup and MDCrashReportTool. ive searched for files you advice in your summary but all i found were in the Apple folder so i didnt touch them but what ive done is that ive copied those to one from one folder to another (#3 in your summary).
    the bloody itunes still doesnt work….

    please help

    • Olga,
      There are two suggestions I have to solving your problem.
      The first is to make sure the timezone on your computer matches the timezone on the iPhone.
      Next, follow these steps (I’m assuming you are running Windows Vista):
      1. Unplug iPhone
      2. rename the SyncServices folder found at C:\Users\\AppData\Roaming\Apple Computer to SyncServices_Old
      3. reconnect iPhone

      Hope this helps.
      Charles

  64. jose says:

    you are amazing! thank you!
    Renaming that file finaly did the trick!

  65. Geras Avila says:

    Hello. I think this is absolutely helpful, but the thing is that it doesn’t work for me, I have an ipod touch 4g and when I connect it it take too long and tells me a message “Itune no ha podido cargar la información de clases de datos de los servicios de sincronización. Vuelva a establecer la conexion o intentarlo más tarde. OK” which mean Itunes couldn’d charge the classes information from the sync services (Sorry for my English, I’m from Mexico) and I tried renaming the files you said but nothing works. It would be awesome if you tell me any advice. PLEASE!

    • Geras,
      Did you make sure your time zone setting on your iPod is the same as the time zone setting on your computer?
      These must be the same in order for iTunes to properly synchronize.

      If they are not the same, reset them to be the same, restart each device and then try iTunes sync again.
      Hope this works for you.
      –Charles

      • Geras Avila says:

        It is the same. Everything is correct, but the thing is that my ipod syncs correctly with other computers, except with mine. When I connect it, iTunes slows down so bad! And then it tells me the message, and my ipod appears in iTunes but I can’t add anything or change anything, it is there and the memory measure is in yellow and it says others only. I’ve tried everything but nothing works. Any other advice? Please. (BTW, thanks for the last one)

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