iPad won't restore after updated to iOS 5

I have updated my iPad 1 to iOS 5. When I try to restore my data from my backup, the process runs for about 5 minutes and I get message "An error occurred while restoring this iPad (-1)". Then I click OK button and it says "iTunes could not restore the iPad because an error occured."How to fix the issue on iOS 5* Set up your iPad as a new device and go to sync everything in iTunes.* After the