Originally Posted by JAMMINKRAZY

Have you tried re-binding the radio/receiver? That could be the solution right there. Also make sure you don't have any wiring issues, put a new switch in and check your receiver's antenna for cuts.

I would also suggest setting your failsafe to neutral for a couple reasons. One being if it does go into failsafe on the track you won't be locking the brakes up in a bad spot(say the middle of the straight with 3 screaming demons behind you). And also if you happen to leave your electronics switched on with the radio off by accident you won't burn out your throttle servo from it sitting at full brake for a half hour.