can't restore back to Apple firmware post seas0npass

i've tried both from iTunes, and after tethered boot, from the ATV2 .

neither is successful. Both fail. 

iTunes gives a 1601 or 1602 error on Windows, and mac.

ATV2 just says restore failed. Any ideas what could be wrong? on 4.2.1


This is a piece of garbage. Rip off. I through away my money. Doesn't work!!!!!!!!!!!