Eugene,
I've set up my Sopcast Channels as per your instructions but I find that I can only watch one channel ( the first one that I choose) regardless of which channel I subsequently choose to watch. Even restarting the server ( via the TV) does not allow me to watch anything else. I have to stop the server then stop & restart the WMS program on the PC before I can watch a different channel.
I've confirmed that I'm watching live channels with the sopcast viewer.