Help MM throttle does not work

[BrianG]

Hmmm. I assume you've double checked all your battery and motor connections/solder joints? A bad solder or loose connection can allow the motor to make the beeps but not allow enough power to turn the motor.

And if that doesn't work: Just for giggles, try using the MM's BEC on 2s (basically a VERY simple stock setup) just to see if it works.

If it still has issues, something is likely wrong with the ESC. But symptoms like you describe sound a lot like the problem is connection related.