EXS 24 Logic Sampler Users Group

Howdy. I just came across this group and was wondering if y'all 
could help me solve this dilemma. I have a problem with drum loops 
and individual drum hits getting cut off and not playing all the way 
through. I have Logic Audio 4.7 on a Dual 500 G4 Mac. This usually 
happens when I start building up a song, but has also happened with 
as few as 2 midi tracks,( assigned to a single or 2 audio 
instruments), triggering the EXS. The last time it happened was when 
I laid down a simple bass line on a mono audio track over a simple 1 
bar loop in the EXS.
 I've tried lenthening the note in the Event List editor, changing 
the length in the instrument parameter window, and messed around 
some with release time in the EXS instrument editor all to no avail. 
Any one know what I might try next?  Thanks.