I tried using quickpwn to jailbreak 2.1, but it has frozen on the boot screen, the boot screen stays static and occasionally the light goes off and reboots back into the Apple icon. Nothing happens and itunes will not let me restore. Right now I cannot even get itunes to recognize that an iphone is plugged in. Occasionally after several unplug / reboots it says "iTunes could not connect to iPhone because an unknown error occured..." and then "iTunes could not connect to iPhone because an invalid response was received from the device" Any ideas? I just want to be able to restore. I've even tried running Quickpwn again, but quickpwn will not even recognize that the iphone is plugged in ?!?!