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

anyone here using Ableton Live to control your XL7?  I've just started
using the program change and midi control stuff in live to control my
external gear.  I've run into a weird problem with the XL7 whn I send
pan info (mid cntrl 10) I can get it to pan hard to the left but when
I got totally to the right I get silence.  I don't think it is a
wiring problem cause if I use the panning knob on the XL7 it pans
fine.  it also works fine with the other synth I've tried (so I don't
think it is Ableton)  

any thought or suggestions would be appriciated.