Gibson EDP/Allen&Heath Mixwizard question

[Todd Chambeau <tchambeau@comcast.net>]

Looperz,

I am looping just an acoustic guitar and vocal with my echoplex  
through a Allen & Heath Mixwizard 16:2.
I am utilizing the A&H's dual effects through auxes 5&6. Basically,  
giving my acoustic on channel one a slap delay, vocals on channel 2  
with a hall reverb.
The A&H's effects are audible until I loop, then the signals become  
dry. I would like to have the loops wet.
The EDP's input is patched to Aux 5 on the back of the mixer and the  
EDP's output is patched to ST1in also on the back of the mixer.
I've tried patching the EDP differently with no luck.
I never really utilized the A&H"s effects until now and for the life  
of me, I cannot figure this out.

Thanks,
Todd