Eviter message d'avertissemnt IE

Bonjour,

Comment faire pour empecher le message d'avertissemnt de IE quand on joue flash.
J'utilse le code suivant venat du site http://www.longtailvideo.com/players/ de Jeroen W.

Merci d'avance,

Code:

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
 
 </HEAD>
 
 <BODY>
  <script type='text/javascript' src='swfobject.js'></script>
 
  <div id='mediaspace'>This div will be replaced</div><BR>
   <div id='mediaspace1'>This div will be replaced</div>
 
  <script type='text/javascript'>
  var s1 = new SWFObject('player.swf','ply','200','40','9','#006633');
  s1.addParam('allowfullscreen','true');
  s1.addParam('allowscriptaccess','always');
  s1.addParam('wmode','opaque');
  s1.addParam('flashvars','file=Legamp3.mp3&backcolor=003300&frontcolor=CCCCCC');
  s1.write('mediaspace');
 </script>
</BODY>
</HTML>