A-37 Dragonfly throttle

I like the A-37 package very much but have not been able to assign a throttle axis in FSX.  So I have been
using the FSX default (KP 9 and 3) keys for throttle control.  Any tips or suggestions for using a controller
axis for throttle will be appreciated.  FYI i am using CH Pro Throttle and Fighterstick.
Best toall,
Ken