can't restore iphone 4 from back up
i synched my iphone, transferred purchases, then backed up.
then i downloaded the most recent version of itunes and iOS 4.3.5.
i installed the software and the iphone hung when windows rebooted.
the iphone was stuck i recovery mode
i clicked "restore" and it restored to factory settings.
every time i click "restore" i get no option to restore from back up as i did in previous restorations.
what's going on. i did everything by the book by making complete back up and syncs before installing.
any help would be GREATLY appreciated.
dell inspiron 6400, Windows Vista