I cannot save joystick configuration on Mission Planer for my quadcopter? It identifies the joystick and all inputs can also be assigned in the joystick window but cannot save it and does not show on it on radio calibration window. The radio calibration show inputs only from the regular radio (TX). I am using APM 2.5 and latest version of the Mission planner. I have tried many joysticks following the documented procedure but no success. Any suggestion to resolve this issue please?