Having a problem setting up esc. here's the equip. Futaba 9C (not 2.4) Turnigy delux 100A SBEC, Sky Lipo 5 cell 2650. I set throttle trim to zero. reversed throttle control (futaba) turned on transmitter set throttle full, plugged in battery. beeped , pulled throttle down to set. My problem...sometimes the throttle works then it starts to cog for lack of a better word. it turns slowly but makes a hidious noise. Then it might work again. I set the esc to the motor specs. made no difference. I have tried other motors and esc's. Various setting and combination of equipment. Same problem. I don't get it. What's going on ??