Apple TV error code 3905. This error code prevents my wifi link. please help.

I keep receiving the error code of 3905. I have a pc with windows vista. It worked this morning as I watched one of my itunes movies on it - no problem. But I didn't have internet access so I retyped my wireless and now I am doomed. My ipod touch and my ipad are still connected via wireless but this error keeps popping up. Please help.

Thanks,

Undercross