Minimwatch cannot see Minimserver

[NeilT]

I have a similar problem with minimwatch on my Windows 7 PC. All was working beautifully, and it accurately represented the state of minimserver on my Raspberry Pi, and allowed me to adjust settings. However, I changed my old Netgear router for a brand new model yesterday and now minimwatch cannot see minimserver. The Pi is visible to my control points, so I can still select and play music, but am no longer able to see the state on my desktop PC. Any ideas why a new router would block access for minimwatch?