I see a flight setting called "Nick" that doesn't relate to anything I know of. I'm connected to FMS via USB to my Futaba FP-T4NBF with these settings:
Rudder 4
Elevator 2
Aileron 1
Throttle 5 but check INV so direction is correct
Tail 4 trim adjust Rudder
Nick 0 because it doesn't respond to any trim controls
Roll 1 trim adjust Aileron
Pitch 2 trim adjust Elevator
I bought my Futaba round connector to USB on EBay from "r_electronic" - works very well!