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

I am having a problem with the S/PDIF out running into my 
soundblaster audigy.  Sometimes it works, sometimes it doesn't.  
Often it quits in the middle of playing something.  The XL-7 is not 
locking up, as I can still hear it through headphones.  I'm 
wondering if anyone else has experienced this and if anyone has a 
clue as to whether it's the XL-7 or the Audigy.  I'm running 1.31 on 
the XL-7 and the newest audigy drivers, (from August I think).

Thanx