problem with gunbound

[ultimatron]

recently...i downloaded gunbound...but whenever i start the game...it will hang at the black screen...no sound...no picture...
later then i found out that the problem might be due to my gunbound setup...
i click default at the setup and click ok...but straight after i do that... i go back to the gunbound setup...but everything was reseted...
anybody know how to solve this problem?

thanks in advance