KAOSS PAD KP3- Many effects not working at 1 venue

[Mr. Adams]

Hello, so I've done a ton of research about this and seems like the issue I'm having has to do with the cables I'm using.

I use my KP3 when I DJ. I've had for a while and used at many places but there's is this 1 restaurant/bar that I DJ that I can only use Delay and maybe 1 or 2 other effects, reminds me in the beginning when I was working on getting the right setup.

So I mainly use Virtual DJ for this on my MacBook Pro, last of the 17" models, running Yosemite. Here's my setup:

-Hercules MK4: (USB to computer) dual RCA out Channels 1/2 into usually channels 5/6 on my Peavy PV6 mixer, with dual TS 1/4"
-KP3: Line in- dual RCA to dual TS 1/4" in EFX Return on PV6
Line out- dual RCA to single TRS 1/4" y cable in EFX Send on PV6
-PV6: Main out- dual TS 1/4" y cable to 1/8" jack for their sound system. (The same as I do at my home studio into my subwoofer.)

They have some sort of sound system that connects to the speakers placed in different locations at the place. The guy told me the name of the system he thinks is ZONE but I'm sure their is some other name specifically.

Anyway, after talking with tech at the store I bought it, he mentioned something about places like this that may use mono systems then I come to find out about TS and TRS cables, I had no idea until now.

Since some of the effects do not work when I am there, seems like I need to use TS for the EFX send on the mixer or TRS on the EFX return or even the main output of the mixer?!?!? I don't have much time to troubleshoot when I'm there, anybody have any ideas on the logical solution for this?!?!? Thanks