LoadMovie using php variables

Hi,

Not sure how to explain this one. however let me try.

My file structure is as follows:

video/bromford/header_video.flv
video/showreel/header_video.flv
video/sydney/header_video.flv

and in my index page i have the following php code

<?php 
$folder = showreel;
?>

and in flash the following AS

[AS]
myVideo_nc = new NetConnection();
myVideo_nc.connect(null);
newStream_ns = new NetStream(myVideo_nc);
videoHolder.attachVideo(newStream_ns);
newStream_ns.play(loadMovieNum(“video/”+folder+"/header_video.flv",0));
[/AS]

this way i thought i would be able to load a different flv into the same swf by just changing the variable on the index page, for example

<?php 
$folder = sydney;
?>

would load in this file “video/sydney/header_video.flv”

but its not working anybody have any ideas?