JRiver as CP problem

[McKenna]

Hi, I am using 2 laptops with Windows 10x64, 1 wifi modem/router and 4 external HDs w almost 4TB of classical music. HDs are USB connected to one of the laptops and there is a JRiver and Minimserver running on that fixed laptop with ethernet connection. The other laptop is the client which I carry around.
I used to utilize JRiver on the fixed as DLNA server and I was able to connect through client JRiver or UAPP on android tablet and phone and Bravia TV with ease. I found JRiver as a server and renderer problematic though.
I installed Minim this week but whatever I did I couldn't use JRiver on the client as control point...except using M as server, Jriver on the same machine as renderer and Jriver on the client as control point. Foobar on the client easily sees and is served, UAPP and Bubble on androids connect easily but I couldn't make it appear on the client Jriver. I disabled both laptops' firewalls, even the firewall on the router, to no avail. What am I missing?

Edit: PS. I use minimwatch...everything is green.