found this in FAQ

"
Windows 7

Windows 7 doesn't have a GL subsystem and instead relies on drivers to provide it. Currently 32bit is working, 64bit has issues that may stop the game from displaying even with shaders turned off. This is not something we can help with as it's an issue with the operating system."

I cant play, and im listening to 4 of my friends on Teamspeak 3 laughing their asses playing it, what a tease..

This is exactly the same problem i have with half-life and its mods..

Is there really actually nothing you can do to help?

Damn you 64 bit =[

You could probably download a Vista Windows 32bit.

But I don't know if it's possible.

that could be illegal.

theres possibly no way to fix this problem. nothing u can do about it. unless u go register a new OS onto ur pc. costs $$ tho.

What video card do you have?

I heard that ATI just released a new catalyst especially for this problem, to fix the openGL support for windows 7.