Korg Poly800/EX800 Users

Hi everybody,
i posted a while back about wether to do a standard filter mod or the 
MOOG SLAYER filter mod. in the end i decided fuck it and went with 
the moog slayer.
its wicked to have a cutoff knob so "close at hand", and it sounds 
kool. however the supposedly awesome "sub-blowing" resonance seems 
non-existent.there is no change even when turning it up within the 
LCD screen. i checked every connection thoroughly before screwing the 
thing back together, so i cant understand why this bastard isnt 
working

HELP ME BEFORE I EAT SOME1S LEGS OFF!!!!!