iTunes 9.2 error

So I recently downloaded the iTunes 9.2 beta and iOs 4 to try out on my ipod touch 3g, and i restored to the 4.0 ipsw, but right before verifying with the apple servers, a notification pops up that says "we could not complete your itunes store request. an unknown error occurred. (-9807)". I figured something was corrupt with the ipsw file, so i did a hard reset on my ipod and tried to reinstall 3.1.3 directly from apple, but the same error popped up, and now I can't get any of the software back on the ipod. I tried restarting, reinstalling, pretty much everything you could think of... and it's still the same

Any thoughts?