My camera won't autofocus?

My Nikon D100 won't auto focus. I have a Nikon AF-S NIKKOR 24-85mm lens. What should i do?

Another Taylor! Is the camera's auto focus turned on? Does the lense's auto focus work at all?

You have two switches to check. The first one is the MA/M autofocus switch on the lens. Be sure it's set for MA. On the body, there's a M/S/C switch on the body for Manual/Single subject/Continuous focus. Switch it to C.