Umm....a bit hard, as you haven't mentioned your platform/OS/videocard setup,
but at a guess I think you're running Mac? ...anyhow...regardless of OS, you
could try installing directx runtime into the same bottle (start cxinstallwizard,
check 'show all service packs and dependencies' ... directx will be in the list)
Also. you might look at this page which details registry entries that sometimes
fix things when you see a white-screen on Mac ;
http://www.screencast.com/users/paulthetall/folders/Default/media/f33b4ed6-b17f-484e-8aa7-fa4428805704
Note: in that screenshot, useGLSL is set to disabled, you might need to enable it.
I'm actually a linux person, so I can only throw you advice here...but if anything
confuses you here, be sure to post back and I'll help if I can ;)