hello, i am trying to use pwnage tool to jb a 3gs. i ran pwnage tool created my ipsw and put my iphone into recovery mode. everything goes good until i open itunes and option click restore and choose my pwned ipsw, i have restored a couple of times to apples 3.1.2, but when i go to restore to the pwned ipsw it says preparing iphone for restore and i wait and then i get an error 1604, looking for help with this problem, i don't know what to do? should i redownload the firmware? when i run pwnage everything goes good i.e. it says i successfully created my ipsw but i get the 1604 error?