probelms with MP3 streaming in IE.

Okay test this:
http://www.calabashmusic.com/widget...wf?song_id=3687

The MP3 loads fine in Opera and in the stand alone flash player, but not in IE

Flash is calling a PHP script which just pushes the mp3s binary out. I'm not trying to stream from shoutcast or anything, I just do:

$fp = fopen($mymp3,"r");
echo fread($fp,$length);

The point of the PHP file is to limit the ammount of the mp3 that comes out. It is only allowing 30 seconds of data to get loaded...

IE is getting the data because I can see my network activity, but it's not playing the sound.

any ideas?