PX4 HIL does not takeoff

Hello dear community
I have followed the instruction to run HIL mode with the px4 and until now it seems that the gazebo is connecting to pixhawk and the qgc, also qgc is connected to the pixhawk and gazebo.
The problem is when I arm the vehicle with the RC (qgc detect arm vehicle) the pixhawk makes its typical sound of “arming” but the gazebo drone is not arming(not spinning the rotors)

Ubuntu 18.04
QGC 4.2.4
Pixhawk 4
firmware 1.13

Can you guys help me to figure it out? I have three days trying to fix it.
I really appreciate any help you can provide.