Precision Flight Controls - can't get gear and flaps to wortk with 737

HI: I have been using the Precision FLight COntrols FLight Yoke and Throttle Quadrant. It has always worked well for all my FSim needs. I used to use it with the NG for FS9, and I used it for the Level D 767 with FSX. I am trying to use it with the 737NGX but I can't seem to get the gear lever or the flap lever to work. I need to use keystrokes with these 2 items. Does anyone know why these are not working? Thanks, Chris Catalano