Red Orchestra 2 Issues

So yesterday i bought RO 2 and RS. I downloaded the ridiculously huge 10 gig file for multiplayer and i start up the game and the banner shows screen flashes black like its gonna show the game starting but then it just minimizes it to my toolbar. I click to open it from the toolbar hear audio and my screen flashes and my screen is a dark grey for about half a second and then it flashes again and minimizes it.

If anyone can help it would be much appreciated  :)

Hope i didn't waste 15 bucks  <_<