Fail to test the deployed FixedwingHITL Simulink model on PX4 in real life (on my plane)

Hello,

I am working with the HITLFixedwingPlant model.

I tested the model in HITL mode (both in monitor-tune and deploy modes), and it works perfectly according to my needs. However, when I try to test it on my fixed-wing aircraft in real life, the motors operate in manual mode. But as soon as I switch to the specified mode or mission mode and arm the system, nothing happens — no motors start, and there's no response.

I have tried using a new model, changing models (using both the QGC mission and a hardcoded mission), but the fixed-wing aircraft still does not respond.

I have unable the HITL from QGC, and all the nessesory changes which are requried.

Can anyone please guide me about that.

Thanks In Advance!