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

Hello all

I'm having trouble hooking up my PX-7 via MIDI to Sonar on my PC.  I 
have a beat created on the PX-7 and when I record using MIDI into 
Sonar it shows MIDI data correctly, but when I play back from sonar 
into the PX-7 nothing plays and the red MIDI input light doesn't even 
light up on the PX-7.  Does anyone record their tracks from PX-7 via 
MIDI to a PC?  I've tried every configuration and option I can think 
of.  This is frustrating me.  Thanks