Yamaha DTXpress/DTXplorer/DTXtreme

I'm pretty new to the DTXpress, so this may be quite simple.  I'm 
trying to connect the sound module to Cakewalk, and I can get it to 
work fairly well, but I'm having trouble with certain kits (namely 
32,33,36,37,38, and 39).  When I go select these kits in Cakewalk or 
on the actual unit, the module starts to display kits in rapid 
succession then defaults to a GM kit.  I was also wondering if there 
is any way to access the individual drum patches (bass drum, snare, 
etc.,) from Cakewalk, in order to gain independent volume control, 
and to mix kits quickly.  Any help I can get on this I will very much 
appreciate...by the way, props to the creator of this site, it has 
been a massive help in learning the in's and out's of this particular 
piece of equipment.

I don't use Cakewalk but I think that a GM kit is selected because there is
a midi program change which is sent by Cakewalk. In order to prevent this
change, the most easy way is to put the mute fonction, therefore all
information which are coming through the channel 10 will be ignored. The
other way is to change the program change settings of the DTXpress, but it
is maybe more complicated.
For mixing the kit, it depends on what you want to do. In all cases, you
must understand that IT IS THE MIDI NOTE WHICH CONTROL THE VOLUME OF THE
SOUND. From Cakewalk, select the note and decrease its volume. Another
method is to change the volume of the midi source you used to record this
notes. From the DTXpress you must be carefull of your trig
settings(->minimum velocity and gain) and the volume of each pads, because
it can change the volume of the note.