Trying to create motion from Pitch and Roll

I have FSX, FSUIPC4 loaded and registered. I have FS Phidgets. I have a Phidgets 4 Servo Motor board.
When I run using pitch and roll variables, pitch sort of works moving the servo a little bit up and down, not a great match to what I see on the Attitude indicator, and for Roll, I see the FS variable change in the FS Phidgets progam but cannot get a Phidget value or result with the servo.
Am I using the correct variables?
What could be wrong?