Is your Direct X up to date? Should be version 9.0c. Even if it is, you should download it and install it anyways. You can download it directly from Microsoft HERE
Try this and let us know if it solves your issue.
If it doesn't solve your problem, then please post back some system specs, including your graphics card and what driver version you're running for it.
War produces veterans, wounded both physically and mentally. They have sacrificed for us.....and it is now our job to help these veterans, as they have already helped us in ways we will never know, in ways that we cannot fathom, and in ways that we take granted every day.