Build and Shoot

Hi!
I just have installed the new Launcher 1.2 (before I have played with 0.75). Now everytime when I join a server, as soon as the game begins, the client.exe doesn´t work. What did I do wrong? Any ideas????

I forgot: here is the error message: initdirectdraw 8x88706245 I didn´t change anything on my computer. Windows 7 prof. with directx 11. Looking forward to your help, folks!!!