iTunes not allowing iPod to hook up

Hi.

My laptop had a little problem, so I reinstalled windows, so anyway, I hook up my iPod to my laptop, because the screen says hook up to iTunes, and after I hook it up, iTunes says, "Cannot view (something like that) iPod because theres a pass lock on it, and I did put it on it, and I cant get into my iPod to unlock it, because it says hook up to iTunes. :'(

Is there a way to fix this?

Zac