Matrix Env to Reverb Send

Greetings.

I'm having a bit of trouble with matrix modulation. I would like to have an envelope sending inversely to my Reverb Send, so as to create a Reverb swell when the note is let go. When I program this in the matrix (Envelope3 > (-64)Reverb Send)), no modulation of the Reverb Send effect occurs. Does anyone know why, and some workarounds for this?

Cheers,

H

Thanks a trillion. My mind can rest easy now.