No videos showing on Viewsonic VMP74
I've got a Viewsonic VMP74 (which is UPnP / DLNA compliant, I believe) hooked up to my network; and Serviio installed on a Mac (MacBook running 10.6.8). The audio tracks took a while to show up, initially the VMP74 was reporting 'No available file to playback'. After a couple of hours they rather suddenly appeared, but the video files remain elusive. The log file (in Info mode, not in debug) is rapidly filling with this:
2011-10-15 19:19:40,475 ERROR [DiscoverySSDPMessageListener] Cannot open multicast socket,will try again
java.net.BindException: Address already in use
at java.net.PlainDatagramSocketImpl.bind0(Native Method)
at java.net.PlainDatagramSocketImpl.bind(PlainDatagramSocketImpl.java:91)
at java.net.DatagramSocket.bind(DatagramSocket.java:372)
at java.net.MulticastSocket.bind(MulticastSocket.java:162)
at java.net.MulticastSocket.<init>(MulticastSocket.java:147)
at java.net.MulticastSocket.<init>(MulticastSocket.java:112)
at org.serviio.util.MultiCastUtils.startMultiCastSocketForListening(MultiCastUtils.java:44)
at org.serviio.upnp.discovery.DiscoverySSDPMessageListener.run(DiscoverySSDPMessageListener.java:79)
at java.lang.Thread.run(Thread.java:680)
Serviio also has a tendancy to crash after a few hours - just disappearing from the dock (but still in the list of running programmes - it's no longer visible on the network - asking it to quit politely works, it doesn't have to be killed).
Suggestions would be really appreciated (although the final plan is to install Serviio on a Linux box which is my main entertainment machine, but I wanted to test it out first, and... haven't quite managed to get there yet).
Thanks!