So hlp with jailbreaking plz and thx?

Ok so I've done it before but when doing one of my friends iPod I came across some problems so blackra1n wasn't working so I fixed it with blackbreeze but it got stuck on recovery. I tried jailbreakme but it got stuck on the slide to unlock and I've tried redsn0w the iPod is a mc model running on 4.2.1 now I need a free site that can jailbreak it or some fixes thanks.