Yamaha DTXpress/DTXplorer/DTXtreme

Hi,

I'm trying to get set up to have the DTXpress tone generator driven 
by MIDI sequence data transmitted from the MIDI sequencer (Sonar) on 
my PC.  So far, I have the DTXpress MIDI In&Out connected to my PC 
via a Midisport 1x1 interface and have a kit on the DTXpress set up 
on Channel 10.  I've got a pre-recorded drum MIDI sequence in Sonar 
set up to output on channel 10 to the Midisport 1x1. 

But it's not working. Obviously, there's more to it?  ~smile~

Probably more here than anybody will want to try and tackle with one 
answer but if someone(s) can help get me started on the right path 
I'll experiment and come back with follow-up questions.  

Thanks for any help,

Hooper