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

I'm having extreme difficulty with the SPDIF output on my MP7. It 
would seem that the digital signal is very weak coming out of the 
box. At first I thought it may have been a cable quality issue, but 
after purchasing a very high quality cable, the problem continued. 
I'm getting a lot of crackles in the signal. I have two soundcards 
with SPDIF input which i've been attempting to use, a Waveterminal 
192L and an Audiophile USB. I've had difficulty with both, although 
the Waveterminal seems slightly more tolerant. I notice that if i 
press my finger on the metal section of the digital jack while 
plugged into the MP7 the charge from my body boosts the signal so it 
is crystal clear... Is there any other way i can boost the power of 
the signal using the MP7 itself or a third party device?