Portal: Prelude Forum

I know someone has already posted a thread on the people being big "ERROR" Signs, but I'm having another problem that also includes "ERROR" signs. I believe I'm at test chamber 15 ( may be 16 ) and when I get to the freight elevator there's error signs and it glitches really strangely. I have a video on YouTube of what's going on:  http://www.youtube.com/watch?v=06JhOSyf-HU

Please help!! I can't finish the chamber without getting this fixed first!!