It's possible the difference in iOS versions may be an issue, even if the revision is minor.
The following procedure is a special firmware recovery mode (DFU). It will erase your Apple device, removing any passcodes, re-install the lastest version of iOS, and then re-sync/restore user data once it is done.
Make sure you have downloaded and installed the latest version of iTunes on your computer before attempting this:
(Mac users can run System Preferences > Software Update (or “Apple Store” for OS X 10.9 users) > Check now to get the latest version for their system in most cases.)
* Open iTunes on your computer and connect the Apple device directly to it
* Turn off the Apple device (press the sleep/wake button on the top until you see the red slider and slide the red slider across to the right OR until the device completely shuts off).
* Hold down the sleep/wake button (on the top) AND the home button (on the front) for 10 seconds
* Release the sleep/wake button but CONTINUE to hold the home button, until...
* iTunes should pop up and tell you it’s found a device in recovery mode, click OK and continue along for the restore.
It may ask whether you wish to restore a backup from iTunes or from iCloud. You should use iCloud since it has the latest backup of your personal data.