According to
http://bluefm.net:
"BueFM [sic] has a special player for listening online. We've added new players with a new technology that allows wonderful sound quality, while allowing us to serve unlimited amounts of listeners (no more "serverfull" messages or buffer will ever happen).
It requires a FREE plug-in that works with your ALREADY installed Windows Media player. To listen you need to install our plug-in once and start enjoying BlueFM."
So it would seem that the player on the web site is not the real issue -- the client must have a plug-in.