iTunes error #11

I'm trying to update to iOS 4.2 right now on my iPod touch 2G, and it picked up an iTunes error #11 after it extracted the software and made my iPod's screen go to the progress bar. Then, the iPod's screen froze to the progress bar of the update and iTunes will not recognize my iPod. I've already restarted iTunes, but the iPod's screen is still frozen to an empty progress bar and iTunes still will not recognize my iPod.

What do I do?