Facing issue in Controlling Aux1 through RC

I have cube orange flight controller with PX4 1.13.0.
I have set the parameter PWM_AUX_MAX1 to 2000, PWM_AUX_MIN1 to 1000, RC_MAP_AUX1 to 6

while toggling RC channel 6 not change in AUX output.
Trying to control servo motor