Yamaha DTXpress/DTXplorer/DTXtreme

Hey, ok well I'm new here...

so uh I figured out how to record every pad on a different track in 
cakewalk using midi, so I can mix that... so yea I got the drumming 
recorded in cakewalk. but its sounds like piano on the pc speakers... 
ok so I thought I got to get them back into the brain so it sounds 
like drum again (in the earphones connected to the brain)... ok well 
I cant seem to get anything back into the brain... and I read even if 
I do it may sound like piano again... so can someone please, give me 
step by step instruction on how to playback from cakwalk to the brain 
so it sounds like drums when I listen in the earphones...

Thanks for your time...

Any help will be greatly appreciated, cuz I really need to figure out 
how to do that...

also I've read a lot of the post in here, but most people already got 
it to sound like a piano in the brain at least...