I've been away from overfly for awhile and I can't get my props to turn. I go through the left stick, right stick initialization and get the rapid red light indicating that it's armed, but when I throttle up - nothing. When I move the throttle above about twenty five percent the beeping that indicates that it's armed stops and when I lower the throttle the "armed" beeping continues. I know I'm being stupid, but can't think what else to try.