I had to switch my in and out midi cable on the DTXpress module... I don't know if this is normal but my cable tagged with the "in" have to go in the "out" on the module and the "out" cable in the "in". That mean that the compagnie that makes my cable probably think that the "in" means the "in" of the computer but Yamaha module is showing "in" for incoming data to the module... All that to say that if you have problem with the midi communication cables try to switch them, it worked for me!
Message
Important Midi cable information if not working
2003-01-06 by roilion41 <roilion@iname.com>