Purchased an SR last year for my Son, purchased a 400-3D 2 weeks a ago for him,,,,,,he Binded his DX6 to the SR but his Collective Pitch is now reversed. Try to lift off but push's the SR heli to the ground. This started after binding his 400 DX6 radio to the SR,, now it also does the same thing with his orginal SR Radio...how to fix/reverse this problem....
