I have been using a PocketPC phone edition for the last couple of months and after testing many different add-ons and software for the PocketPC it got to a point where my device was not very useful as it was taking a lot of time to boot and became very irresponsive. So I decided to do a hard reset and clear all memory contents and then restore it using a backup that I had created earlier but when I tried to restore it Activesync came up with the following message

"Restore cannot be completed successfully. The selected backup file was created from a different type of mobile device."

At this point I was getting worried since I did not want to go through the hassle of reconfiguring my PocketPC. Then I found that you will get this message under a couple of circumstances: either you've recently done a software upgrade (a new release of the operating system / ROM upgrade) and are trying to restore a backup that applies to the older software operating system or more commonly, you'll see this after having reset your machine, and the device is set to a different region to the region in use when it was backed up (it defaults to US English). Go to 'Settings | System | Regional settings', and switch to the appropriate language.

This last reason was the one that prevented me from restoring my backup.