Minim Server not visible on WiFi network

[nevcarter]

Hi,
I have recently set up Minim Server on my PC to serve classical music to my Cambridge Audio Stream Magic 6 network player and my samsung tab 10 tablet and Sony Xperia phone. The server is working via wired network to my Stream Magic player, but I can't get my two android devices to see the server via WiFi. I can see the info page from my tablet when typing in the IP address:9790.
Is this a multicast discovery message problem and how do I get round it, please? My wireless router is the Plusnet Hub One | Software version 4.7.5.1.83.8.226.

Thanks, Nev.