I just installed WA and the beta update (newest version of course)

Everything was set, just when i saw the logo becoming full (loading screen)

I suddenly got an error...

Is there a way to fix this?

And i was able to choose my resolution 1920 x 1200 but i didnt see any difference ingame... :S

Thx in advance

EDIT:

W:A Beta Version: v3.6.28.0
Operating System: XP Pro with service pack 2
CPU: Intel 3,2 ghz
Motherboard: MSI
System Memory: 1 gb ram
Video Card / Driver Revision: Nvidia xfxGeForce 7600GT - 162.15
DirectX Revision: i got directx 9.0c
Nature of the problem: exiting the game and poppung up with some error window just when its going to start the round.