Patches and discussion for Ensoniq VFX family

hey again
can anyone help me with my VFXSD. i cant seem to get aftertouch to 
work on it. i get get other modulation methods happening but not the 
pressure one
and i have been into the patch select menu aswell and still cant get 
it to work
is there some special way to do it or does mine just not work
cheers
Miles