VST PRO OR SE STEREO SEND TO PERFORMER

Ive been trying to get this thing working for a couple months now and am hoping someone can help. I get everything setup and It appears that I’m in stereo and my TB is stereo …as soon as my performer connects to me the TB goes to mono for both of us! I need to send stereo back to my performer not only from the tracks they are playing with but also from my TB mic and my keyboard so I can play example parts for them and they can hear what I’m playing in stereo.
My question is how do I set this up to do that. I have been working with the default VST SE load when I run Cubase so I was assuming this would work right away. What am I missing or what do I have ton change here?

Thanks Much

Chris