I am trying to go back to 1.0.2 on a brand new, nerver uses iphone. I downloaded the firmware, uncompressed it and have it on desktop. I deactivated the itunes helper...i connect to itunes holding down the home and sleep buttons...i click on restore holding down the option key and I am being aske to chose which firmware...i find it on my desktop...only it is not activated as i click it...what now?