Something happened????

I was out running my hellfire the other day and it came down off of a jump and for some reason just stopped working. The steering servo still works and the motor still beeps when I pull the red jumper but when I pull the throttle nothing happens. All the wires are properly hooked up and the controller did not pop or smoke or burnup so I'm out of ideas as to what could be the problem. Any ideas?

Thanks guys,

Big D