I am able to find my render server Lacie Lacinema and my render TV Panasonic Viera VT30 but the program loads and its searching the file but it stops afterwards. Tried on avi files and mkv both added on the conf file.
I don't really know anything about your server and your setup but I had the same thing happen to me.
It's probably because the "this program cross references by filename" as he wrote. I tried a couple of different softwares on my server and the only one that didn't have this effect is Serviio. So if you have the possibility try that.