Blank Message Box

I'm usually unable to play any games with game guard but it's usually because I get BSOD.
This time I run it as admin in compatibility mode with Windows XP service pack 2. I get the little start up menu before you press start game. Then I try and start it up and game guard looks like it works fine and then I get this small blank box.

http://yfrog.com/0370296584j

I've tried looking through to see if anyone else had the problem but I only found one thread which no one posted in.

I'm running Windows Vista Home Premium Build 6002 with a NVIDIA GeForce 9600 GT