lol lame, I was gonna try that but I have the same joystick

maybe I'll give it a shot anyway. if it doesn't work I guess I can install the logetech software and see if I can assign keypad keys to the band.
EDIT: I just looked at your actionmap. for land vehicles you have forward and backward mapped to your X axis not your slider
action name="v_moveforward" onPress="1" onRelease="1" retriggerable="1">
<key name="w"/>
<key name="joyrot_x"/>
maybe I'm just looking in the wrong place but if this is the case maybe you just forgot to save?