EXS 24 Logic Sampler Users Group

I'm having the damnedest time getting my Emagic istruments (EXS included) 
to respond to CC's from my new MIDI controller with lots O' knobs.  I can see 
in the enviornment that the CC message is being recieved and it's the proper 
CC mesage per EXS manual..but alas I can't even get the filter cutoff to 
respond..Logic 6.4 with AMT8 MIDI interface..someone shed some light for 
me please..I'm tired of fiddiling and just want to make some music.

thanx
Silas