[TimTheGreat]

I had the same problem and it took quite a while to figure out.

try:
            self.camera = wpilib.USBCamera()
            self.camera.startCapture()
            self.camServ = wpilib.CameraServer()
            self.camServ.startAutomaticCapture(self.camera)
        except:
            self.camera = None

So you create a camera object, start it, then start the camera server. The try/except is in case you want to test without the camera, and it won't break.