Error 6, 46 does not restore.
 

How to solve this problem? error 6 on custom FW n 46 on orignial FW.
During the process, it boots up till the apple logo with the processing bar, but it does not restore, just hangs there there, restoring 0% and fail...

It's a iphone 3G

first u open redsn0w and select 3g 4.2.1 orignal frimware just enter pwned dfu mode right now and after this prosess custom firmware ok