How to run a quadplane in SITL with ICE engine enabled

Hi, guys. I’m trying to run quadplane with ICE engine in SITL, howevery the ICE engine seems not work right.
I started sitl by this command
sim_vehicle.py -f quadplane --console
then I changed these paramters:
RELAY_PIN -1
RPM_TYPE 1
ICE_ENABLE 1
ICE_RPM_CHAN 1
ICE_START_CHAN 14
RC11_FUNCTION 67
RC12_FUNCTION 69

Did I miss some parameters or some of the parameters are wrong. Need for your help.