I tried upgrading to os 4.5...it failed midway through. now, when i try to turn on the device, the led inicator blinks red and the screen stays black. i tried to follow the directions on the Crackberry Post "how to fix your nuked bb..." however, i cannot locate the AppLoader directory...only an apploader.dll, which is under .../programfiles/RIM/Blackberry/apploader.dll... ugh...when i plug the bb into the comp, it says usb device not recognize. BB desktop manager recognizes a bb, but says the PIN is 0 and will not allow me to restore to pre-failed install attempt...any suggestions? thanks!!