Brushless Twitching, no throttle

[ozdave]

The motor twitches. back and forth. Then when i try to apply the throttle unless i do it reaallly slowly it will cut out and stop everything including the twitching.

Release the throttle and it twitches again.

Hard to post a vid as its all in pieces at the moment. Was checking all the connectors etc on the weekend. All look fine