Can't control plane elevator.

In aircraft that use up/down keys for elevator the elevator does not work.
I have a xbox 360 controller and a keyboard, neither of them work.
I tried changing throttle to W&S but it didn't change anything.
I can control cars with the controller and also with my keyboard.
I have tried multiple aircraft.
Even changing shifting mode or gears wil not let me change elevator.

(update)
only in 1 of the 3 planes, the Strato HMX920 the joystick of the plane does react to my elevator input but the...

Can't control plane elevator.