You could try reinstillation of the driver but I think you should try to describe the problem that you have instead of just telling us that you have one -.-
It is like showing up to a pizza joint and just asking for pizza when they have a full menu of choices that you can make.
As nforce4max said, your discription leave a lot to the imagination. We could begin with countless possibilities so more information will help us to hone in on an answer.