FBWA Mode : Rotors don't Tilt during flight test

Hi forum,
I am currently working on a project of a flying wing with tiltable front rotors. I am on a pixhawk2 Cube.
The goal is to make a transition between a fixed wing mode and a VTOL mode. I was able to configure with the help of the documentation the flight modes (which are 3: QSTABILIZE, FBWA and MANUAL).
The fact is that the rotos tilt to the ground when switching between manual and QSTABilize mode. However, I made real flight tests and after having taken altitude, I change the flight mode in FBWA but nothing happens. The engines do not tilt and the wing does not take speed.
Does anyone have a possible lead
Have a nice day

Can you post a log showing the problem?