upgraded to firmware 2.2.1. and ran quickpwn 2.2.5. after ive completed holding the buttons the computer says its sending the info to the phone. however at this point the phone goes to a completely white screen. however quickpwn finishes sending the info then confirms its done. the screen remains white until you remove it from the usb cord. once it reboots, there is no jailbreak. ive worked at this for days and cant figure out what im doing wrong or what step im skipping. could it be the computer? or something with iTunes?