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=10134.0Out 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.
Cheers,
Matt.