This one got me for a while when I first started using the RC.
Q: My robot isnt responding to controllers, wont download a new program, and is stuck in disabled mode. What do I do?
A: 1)hold down both the program and reset buttons.
2)Then, let go of the reset button. (The power light will be blinking green. )
3)Wait until the green light is solid.
4)Let go of the program button.
or see
here