Mine did the same thing, I switched my Servos to Spekturm, you have to reverse the Rudder control IN THE TRANSMITTER, and reverse the GYRO ON THE HELI. Once I did that mine flew no issues.

Go to the "REVERSE" menu on you TX, and select RUDD then reverse the thro of the servo. On the Heli the Switch on the the top of the Gyro I beleve, Simply thro the switch to the other position. Do this powered down. Power back up and all should be good.