PX4 simulink model does not work in HITL mode

Hello i designed a controller using simulink pilot support package for px4 and i want to perform HITL test on the controller but the problem is that when i follow the instructions on the px4 website to operate the px4 in HITL mode but when i try to run the simulink app nothing happen and when press the top command i see that the app is running but it consumes 0 disk usage which i think means that it doesn’t run so if anyone knows anything it would great help to me

Thanks in advance