I will continue the conversation here. I created a backup but the phone cannot locate it.
(1) Did you create the backup through ClockworkMod Recovery, ROM Manager, ....with what?
(2) If through ROM Manager or CWM, turn your phone off, then hold down Volume Up, Volume Down, and Power.
(3) Use the volume keys to navigate to the "RECOVERY". Press power to select. That should take you into CWM--unless you don't have it, then you would need to flash it via fastboot.
(4) Once in recovery, go to Backup/Restore, and it should bring up the folder where the backup is. If not, you should be able to hunt around for it. It's usually in a folder titled clockwork or clockwork mod. If you have neither, check for a folder named "rom manager" or any derivative thereof.