No longer spins when armed

Hi I have a Pixhawk 2.4.8,. I have had it running but after using Mission Planner to calibrate the ESC’s I now get no moter spinning. It seems to arm ok but thats it no spin. I am using Littlebee Blheli esc’s and have re-flashed them with Bl Heli suite using Arduino, but nothing. Also I flashed the Pix with the latest Auducopter firmware, is that ok for this variant of the Pix. A bit stuck here any help would be welcomed.

Please adjust MOT_SPIN_ARM parameter