receiver question

[BrianG]

Servos don't care about the transmission method of the signal, they just care that they get a periodic set of pulses (50-60Hz) that are "on" between 1ms and 2ms. If the servo is not faulty, the problem almost has to be something wrong in the programming of the transmitter/receiver.

This may sound dumb but make sure you have the steering servo in the steering servo jack. No chance that it's in the CH3 slot?

To see if it's the steering servo itself, put the steering servo jack into the throttle slot. Throttle on the Tx will turn the servo one way, brake/reverse will turn the servo the other way.