Yamaha DTXpress/DTXplorer/DTXtreme

I just tried dumpster... it doesnt seem to work...

what I mean is I can get the info from the drumset to the comp, and 
record it on cakewalk or whatever... but now I would like to have it 
recorded with the sounds of the drumset and not the default midi 
sounds...

so I thought that I would have to get what I recorded in cakewalk 
back to the brain, so it gets the sound of the dtxpress, and then 
record it normaly to cakewalk using a normal cable (not a midi one)

reason I dont record directly like that and I want to use midi first 
is that I want to be able to play with the volume of each pad as much 
as I want without having to re-play it another time...

So anyway I cant seem to be able to get info from the computer to the 
brain...

Anyone know why?

Anyone know another way of doing what I want to do?