Emu XL-7 & MP-7 User's Group

i haven't gotten any reply to previous posts, but i will continue 
trying.  i have mp7 (got it last week) and i use cubase and cakewalk 
for sysex backup.  it won't send data into these programs.  a midi 
light comes on (on the mp7) but nothing is sent.  i have the 
audity2000 synth and sysex works fine, so i know it's not my midi 
interface or programs that are the problem.  i'm stumped.  i have 
taken the machine back to the store, exchanged it, and the same 
problem exists with the new one.  i am looking for any suggestions on 
this matter.  cheers to anyone who replies