EDP plus GR-33 set up

[Tommy Kochel <touch.guitarist@verizon.net>]

I need help.  I just got my EDP and can loop with my guitar sound, but not
the MIDI sounds from my GR-33.

My system is simple:  my instrument into the GR-33.  The GR-33 effects loop
out to a Digitech Talk Box, the Talk Box to the EDP, and the EDP back to 
the
Return of the GR-33.  This is one of the ways to set it up recommended in
the EDP manual.

Yet I cannot hear any GR-33 patches looped.  Do I need a couple MIDI cables
to send tone information OUT from the GR-33, IN to the EDP, then OUT from
the EDP and back IN to the GR-33?  (the speaker cables go directly from the
stereo outputs on the GR-33 into two separate channels on my mixer.

(I tried "effects looping" the EDP directly to my mixer, but when I do so I
only get sound in one of my speakers.)

Thanks

Tommy Kochel

"Entertainment is about telling everybody that everything's alright but
music is on the side of the upsetters and that's where I'm at."  - Bill
Bruford, April 10, 1976, Sounds.