After hard crash I noticed drone was not as stable as it once was, so I reset IMU and calibrate compass and everything seems fine.i fly a few times and drone responds great and flies great. A few days later I go to fly and everything starts up fine but as I take off I notice no movement of my camera, the RC roller will not operate the camera. It will still take video and photos but no camera movement with RC. Any help and advice would be appreciated.