EXS 24 Logic Sampler Users Group

I'm quite a lousy keyboard player so I've never used a volume pedal before.
Today I did a session with a player who needed to do a lot of volume
swelling and was used to doing it with a foot volume pedal connected to the
master keyboard.
We were using some Miroslav Vitous EXS orchestral instruments that I have
translated from my Sample Cell CD Roms.
We could not get the EXS to receive any Vol Pedal info.
I tried the same pedal on my other modules and it worked fine.
I loaded up the Sample Cell version and it also would not respond.
So...........does this mean that Vitous doesn't expect any one to use volume
pedal control or won't the EXS or Sample Cell respond to a Volume pedal via
the master keyboard.
Basic stuff but there you have it my learned compatriots.
Phil Buckle.