Yamaha DTXpress/DTXplorer/DTXtreme

I purchased a Yamaha DTXpress drum kit and module a while back.  I've 
started on a new album, and decided that I'd hook the drum module up 
direct to my DIGI001 (Protools) system via MIDI.  I've not recorded 
the drums on this with MIDI yet, only analog.  Anyway, I create a 
track in Protools, select channel 10 as my output channel, and start 
scripting in my stuff.  Everything goes fine.  Now, I also have a 
sound module MIDI'd into my system that I use to give me piano, 
string, etc, and I have two other MIDI tracks put down.  After making 
my drum track, I play the song.  The drums play fine, and the other 
midi tracks play fine...except the DTXPRESS is not only playing on 
channel 10, but it's also playing stuff on channel 2, and if I change 
to different songs on the DTXPRESS, it'll just to different 
channels.  I've gone through all the setting I know to look at, and I 
don't see anywhere how to disable other MIDI channels.  I've read the 
book, and it briefly describes how to enable channel 10, but that's 
about it.  I've varied every MIDI setting on the unit to see if the 
problem will go away, but it doesn't.  Shoot, i don't even want the 
songs enabled.  I don't use prerecorded beats.  It appears to be 
playing MIDI from these songs that are tied into my selected kit.  
What am I missing here?  Can someone enlighten me?  Thanks  Roy