Hi,
I've installed Mezzmo (trial) - added a couple of movies to library to test connection (had to sort out my firewall first). My Samsung TV (B650) showed Mezzmo in the media server list and I could view at least one of the movies - other had "format not supported" error but we'll leave that for another time.

I added a whole bunch of movies to my library, stopped and restarted the server. Now Mezzmo has disappeared from TV media server list.

Things I've checked:
Stopped my firewall just in case but that's not the problem.
Checked the IP address on the media devices list which matches TV IP on my network.
Restarted PC - standard check no.1
Restarted media server several times - also checked still enabled in Windows Services.
Went back after about 30min just in case there is some delay between TV server list and Mezzmo.

Still no luck - any advice welcome.
Thanks.