I am setting up my Phantom 2 Vision Plus and am having trouble with the camera control. The camera is operating, powered up, etc. But, I cannot rotate the camera, either with the wheel on the controller or with the app on my iPhone. The gimbal is working. If I move the Phantom, it remains steady. But the camera remains in the full up position and I cannot get it to rotate. This occurs whether the acceleromator setting in the app is on or off, no response from the camera. Any ideas?