I'm guessing you mean when people click the links the music doesn't get loaded into the MP3 player list on the site?
I just tried it in IE and it worked, but Firefox is reporting problems with the Javascript. The main one is on line 308 where it reports "themovie.PercentLoad is not a function". Thats line 308 on the front page.
In essence there are big problems with your Javascript..
I would look further, but the blue background and red text is making my eyes go funny.
Trev