four rapid red flashing LED upon start-up, error 29 in naza

[remvideo]

here is my issue

http://www.youtube.com/watch?v=CeMm-4gN ... e=youtu.be

recently installed a goodluckbuy gimbal, that's the only thing I can possibly attribute this too... it flew perfectly, calibrated etc, then on the third flight starting slowly drifting to the right... and after that flight, it won't fly at all.