Servo doesn't work

Hello guys
I have been working on a project to control a plane over 4g and I’m done with that I get the telemetry and so on.
But now as may know I’m new with the pixhawk controller and missonplaner. So how do I start to control a servo and the motor.
I have linked a video so you can se the problem I’m facing :sweat_smile:

I have solved the problem. The problem was the safety switch :roll_eyes: