HELP! - Error 6 in itunes - can't restore

OK i've posted this before but I still cant get this thing to work. I jailbroke my ipod. Everything was going smoothly then when I tried to sync to my itunes library it would automatically quit out. Then I tried to do a restore with the usual methods and I got an "error 6 cannot restore" message.

I've tried everything possible, restarting computer, changing users, reinstalling itunes, deleting itunes library, nothing works. help!

 

thanks, turns out my whole system needed to me reinstalled, Tried it on my friends mac and it worked fine