first question is your tx. antenna fully extended if not you can get some cross over interference . make sure your reciever antenna is routed outside your plane and that it passes radio check with the tx. antenna down at 30 paces away you might need some help with that the engine doesn't have to be running if its O.K then check it with the motor running . thats a start alot of times when my tx. antenna is collapsed I notice some twitching as soon as I extend the antenna it goes away and will fly fine .try it and see.