Plutonium

I found a solution, installing DirectX9 from Microsoft fixes the issue.

When I open the game, either multiplayer or zombies, there's no sound at all. My audio output is correct, set to my headset ( I do have separate default playback and communications device because of my headset). I think the problem lies in the fact that Bo2 never actually shows up in my audio mixer, it only shows the plutonium client bootstrapper and I believe that my pc is trying to get audio from the bootstrapper, which means no audio. Can anyone help?