Yamaha DTXpress/DTXplorer/DTXtreme

Hello,

im new to this group and a new user of the yamaha dtxpress. Ive just 
bought a dtxpress 2, and tried to download some sysex from this 
groups to the dtxpress2, it doesnt work. Ok. (ive just seen a message 
about the "incompatibility")

But the thing who is boring me, is that when im trying  to upload 
files from mod to pc with DTXchange  : it doesnt work neither. (there 
s no message on the dtxpress, just like if it wasnt plug to my pc)
So i just wonder if it is possible to use dtxchange with the 
dtxpress2. or maybe (...probably) i missed something in midi setup or 
something else.

Moumouche