Can't get XBox 360 Controller to Work?

[axelsharp]

I know that my controller works. I plugged it in and the green light goes on. I can use it for other emulators, and I can set keys and what not no problem (on other programs)

But for some reason when I press F11 to configure the controllers, the only thing that is available in the drop down menu is "Keyboard." Is there a way to fix this?