I have RealPlayer (G2) version 6.0.3.143, and it works fine. If you click on the link and your browser tries to open the site, something isn't set up right. I used to know how to fix this in Windows, and I can figure it out again, but right now I'm drawing a blank. The only thing I can think of is to try re-installing RealPlayer, and if it asks you if you want to make it your default program for sound files, say "yes."

If you get the message from inside RealPlayer, I dunno...