Yamaha DTXpress/DTXplorer/DTXtreme

Hello group,
I am doing some simple analog recording, playing along to CD's and 
noticing some anomalies when played back. The biggest issue is when 
playing a double stroke roll on the snare pad. It is a very staccato 
sound and totally unnatural sounding. Anyone have any recommendations 
to improve this? I have tried other snare sounds with minimal 
improvement but perhaps someone out there can offer some suggestions 
with reverb, gating or whatever.
My rig is an older DTX 2.0.
If newer modules deal with this situation better I would also like to 
hear about them. 
Thanks
plh