Checked, it was binded, but reconnected again.It looks like the camera is bound to the controller but not the aircraft.
Turn off the ST16.
Put the gimbal lock on the camera. Turn on the H Plus.
After it boots up, turn the aircraft up side down and see if the motor lights all flash light green.
Turn on the ST16. When it finishes booting up, go to the bind menu and bind the aircraft.
You may have to press the refresh arrows several times before the aircraft is listed.