I-pilot question

I am having a problem with my i-pilot. Twice now after about an hour of use. My remote wont turn on the motor propeller but will turn the motor left and right. The remote shows that the prop is turning but its not.
When i plug in the foot controller the remote starts working and continues to work as long as foot controller is plugged in. Any ideas?

Can try the "learn" function for the remote, change the remote battery, check all the connections but since it works at times, it might be the circuit board. I leave my pedal connected all the time as i use it when possible.