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

Hi - I have a question about this PX Rom I recently attained - as soon 
as I got it I was looking through the sounds and I noticed that most of 
the sounds on the "lnk" don't sound anything - but the midi out light 
is flashing so I know information is being sent - the person I got it 
from said that there have been a lot of problems with roms such as 
this - is this true ... what can be done to fix it ?