JW Player 4.6 not working on IE7 on Vista

JW Player 4.6 not working on IE7 on Vista. I go to the setup wizard create the code for Http streaming.

When I play it on IE7 or IE8 on XP and even FireFox it works fine, but when I try to view video on IE7 in Vista I just get a White screen with no error message.

Here is the code I am using:

<script type='text/javascript' src='http://wpc.11BF.edgecastcdn.net/0011BF/IA_Media_Player/swfobject.js'></script>

<div id='mediaspace'>F8</div>

<script type='text/javascript'>
var so = new SWFObject('http://wpc.11BF.edgecastcdn.net/0011BF/IA_Media_Player/player.swf','mpl','640','500','9.0.124');
so.addParam('allowfullscreen','true');
so.addParam('allowscriptaccess','always');
so.addParam('wmode','opaque');
so.addVariable('file','http://wpc.11BF.edgecastcdn.net/0011BF/Videos/ACF8S03P3H.flv');
so.addVariable('skin','http://wpc.11BF.edgecastcdn.net/0011BF/IA_Media_Player/snel/snel.swf');
so.write('mediaspace');
</script>

What can the problem be?