the only thing I see in the manual that deals with this is the batteries not being fully charged....
I don't want to offend, as I don't know your level of proficiency, but you are aware, for example, that the motor is either ON or OFF, and that it's only ON when you have the throttle stick held fully forward. if it's still giving you trouble, I'd suggest contacting HobbyPeople.
Sorry I couldn't be more helpful.