Essaye avec sa :
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="shortcut icon" href="Favicon.ico" type="image/x-icon" />
<script type="text/javascript" src="swfobject.js"></script>
<title>Accueil</title></head>
<div id="flashcontent">
<strong>Installer ou faite la mise à jour de Flash Player</strong>
</div>
<script type="text/javascript">
var so = new SWFObject("index.swf", "sotester", "100%", "100%", "8", "#000000");
so.addParam("allowFullScreen", "true");
so.addParam("scale", "noscale");
so.addParam("menu", "false");
so.write("flashcontent");
</script>
</body>
</html>