Are you using it with motion? If so, did you set up static IPs? The reason I ask is because one or two people have been having problems http://forum.linuxmce.org/index.php?topic=10134.0
Out of interest, does it still work properly if you leave the "Configuration" field blank? My understanding was that this is required to view the video feed, but I always put this path in "Path" at the top, leaving "Configuration" blank. And apart from the DHCP issues in the aforementioned thread, the video feed works fine for me.