Gazebo ARDUSUB SITL+MAVROS RC OVERRIDE ISSUE

Dear all,
I need help in this.
I finally managed to set up the SITL for Ardusub and I can finally see my ROV in GAZEBO, Arm it and change modes. However, MY ROV is not responding to RC overrides at all. Can I know why?
Is it possible to do sth to fix this or add this feature if it doesnt exist yet

Hi,

Did you arm the ROV ?
How are you sending the RC overrides ?