From Valve Developer Community
Revision as of 00:45, 13 October 2006 by Cubedude (deleteing some more)
My Problem is solved!!!
I want to Thank everyone who helped me, and Thank you Andreasen for helping me through out this, and never giving up.
The problem was my graphic card driver.Cubedude 16:33, 7 Feb 2006 (PST)