Just a quick bit o' info for you, PS uses OpenGL, not DX. So the version of DX you have shouldn't effect the game.
If it isn't too much trouble, please add your driver version anyways. We do get people that insist that it isn't their driver version, yet when they finally state it, that's what the problem is. So we like to not assume anything. Nothing aginst you personally, it's just how things are.