flashvars???

[colinod]

I have a flash file setup to play an mp3, just a simple player at the moment.
the followinf code tells it what the file to play is

s = new Sound();
s.loadSound("test.mp3",true);
gotoAndPlay("Playing");

what i want to do is pass the name of the mp3 file from the param tag in the html page

i have tried the following

<param name="Flashvars" value="&amp;mp3file=test.mp3">

but cant figure out how to get this variable in the actionscript

can anyone help??