advanced hotlinking block qustion

[eluser]Future Webs[/eluser]
my htaccess already blocks anything not coming from my site and works fine for images and other files its only when the files are hot linked from within a flash mp3 player that it manages to get around the htaccess.

had me stumped

i changed the file name of the file they were using for now so its less of a mission critical issue more something that baffled me