Cambridge Audio CXNv2 does not see the Media server

I have a Cambridge Audio CXNv2 streamer, ostensibly bought to replace my Touch. The CNX does not come with its own UPnP software, so you are expected to add a package of your own choice, thus enabling the CXN to access your media library. I was expecting to be able to use the Logitech media server, as it's a UPnP but the CXN doesn't see it. I installed both MediaMonkey and MinimServer and the CXN sees both of them.
Does anyone know why the Logitech Media Server is invisible to the CXN?