Yamaha DTXpress/DTXplorer/DTXtreme

hey all, just bought the last available dtxpress limited edition and 
have a couple questions cause im having some trouble...

1.  out of the box should the dtxpress receive midi and tnasmit it?
2.  if so, what channel does it defalt to?  it appears  that at least 
some of the sysex messages go through channel 10.

3.  ive gone through the manual and the list archive and tried some 
differnt stuff, but its a no go for me.  all im trying to do is play 
midi notes into PC cubase 5 and then have cubase tell the dtx what to 
play back.  just simple stuff but the solution is eluding me.

4.  do i have to be on a specific kit for the trasmission?

thanks in advance for any assistance,
eugene