Problème centrer objet Flash.

Bonjour,

Voila j'ai un petit souci, j'ai voulu intégrer une galerie Flash sur le site que je suis entrain de refaire, le problème c'est que je n'arrive absolument pas a recentrer le bloc. Si quelqu'un a une solution je suis preneur.

Voici le code de la page html.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-US" xml:lang="fr">
<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Galerie</title>

<link rel="stylesheet" href="style.css" type="text/css" media="screen" />
<!--[if IE 6]><link rel="stylesheet" href="style.ie6.css" type="text/css" media="screen" /><![endif]-->
<!--[if IE 7]><link rel="stylesheet" href="style.ie7.css" type="text/css" media="screen" /><![endif]-->

<script type="text/javascript" src="swfobject.js"></script>
<script type="text/javascript">
var flashvars = {};
var params = {};
params.scale = "noscale";
params.salign = "tl";
params.wmode = "window";
var attributes = {};
swfobject.embedSWF("CircularGalleryFX.swf", "CircularGalleryFXDiv", "600", "600", "9.0.0", false, flashvars, params, attributes);
</script>

<script type="text/javascript" src="script.js"></script>
</head>
<body>
<div id="art-main">
<div class="art-sheet">
<div class="art-sheet-tl"></div>
<div class="art-sheet-tr"></div>
<div class="art-sheet-bl"></div>
<div class="art-sheet-br"></div>
<div class="art-sheet-tc"></div>
<div class="art-sheet-bc"></div>
<div class="art-sheet-cl"></div>
<div class="art-sheet-cr"></div>
<div class="art-sheet-body">
<div class="art-header">
<div class="art-header-png"></div>
<div class="art-header-jpeg"></div>
<div class="art-logo">
<h1 id="name-text" class="art-logo-name"><a href="#"></a></h1>
<div id="slogan-text" class="art-logo-text"></div>
</div>
</div>
<div class="art-nav">
<div class="l"></div>
<div class="r"></div>
<ul class="art-menu">
<li>
<a href="#" class="active"><span class="l"></span><span class="r"></span><span class="t">Accueil</span></a>
</li>
<li>
<a href="#"><span class="l"></span><span class="r"></span><span class="t">Présentation</span></a>
<ul>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
</ul>
</li>
<li>
<a href="#"><span class="l"></span><span class="r"></span><span class="t"></span></a>
<ul>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
</ul>
</li>
<li>
<a href="#"><span class="l"></span><span class="r"></span><span class="t"></span></a>
<ul>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
<li><a href="#"></a></li>
</ul>
</li>
<li>
<a href="#"><span class="l"></span><span class="r"></span><span class="t"></span></a>
<ul>
<li><a href="#">C</a></li>
<li><a href="#"></a></li>
<li><a href="#"> </a></li>
</ul>
</li>
<li>
<a href="#"><span class="l"></span><span class="r"></span><span class="t">Galerie et Liens</span></a>
<ul>
<li><a href="#">Galerie</a></li>
<li><a href="#">Liens</a></li>
<li><a href="#">Contact</a></li>
</ul>
</li>
<li>
</li>
</ul>
</div>
<div class="art-content-layout">
<div class="art-content-layout-row">
<div class="art-layout-cell art-content">
<div class="art-post">
<div class="art-post-tl"></div>
<div class="art-post-tr"></div>
<div class="art-post-bl"></div>
<div class="art-post-br"></div>
<div class="art-post-tc"></div>
<div class="art-post-bc"></div>
<div class="art-post-cl"></div>
<div class="art-post-cr"></div>
<div class="art-post-cc"></div>
<div class="art-post-body">
<div class="art-post-inner art-article">
<h2 class="art-postheader">
Présentation
</h2>
<div class="art-postcontent">
<!-- article-content -->

<p><H1>L'Antiquité tardive</H1>
<div id="CircularGalleryFXDiv">

</span>

<div class="art-content-layout overview-table">
<div class="art-content-layout-row">
<div class="art-layout-cell"></div><!-- end cell -->
<div class="art-layout-cell"></div><!-- end cell -->
<div class="art-layout-cell"></div><!-- end cell -->
</div><!-- end row -->
</div><!-- end table -->

<!-- /article-content -->
</div>
<div class="cleared"></div>
</div>

<div class="cleared"></div>
</div>

</div>
</div>
</div>
</div>
<div class="cleared"></div><div class="art-footer">
<div class="art-footer-t"></div>
<div class="art-footer-l"></div>
<div class="art-footer-b"></div>
<div class="art-footer-r"></div>
<div class="art-footer-body">
<div class="art-footer-text">
<p><a href="#">Contact Us</a> | <a href="#">Terms of Use</a> | <a href="#">Trademarks</a>
| <a href="#">Privacy Statement</a><br />
Copyright © 2010 ---. All Rights Reserved.</p>
</div>
<div class="cleared"></div>
</div>
</div>
<div class="cleared"></div>
</div>
</div>
<div class="cleared"></div>
<p class="art-page-footer"></p>
</div>

</body>
</html>