I have been trawling through these forums the last few hours and I have tried everything so I must be doing something wrong.
My 1st gen iphone is running ziphone 3.0 at 1.1.4 Firmware.
I try to restore to 2.1 firmware in itunes but I get the error 5, infact if I try to restore to any version firmware I get the 5 error. I tried putting the phone into dui mode but I get the same error.