Hey, my simpleviewer gallery works well in IE and Safari but doesnt show up in Firefox.
Its located at: www.ontwerpstudio-luka.nl > portfolio
My website is build in PHP and CSS, and my portfolio page is also a .php document (it doesnt mather what kind of document it is because its included so it could be .php .html of just a .txt document).
Here is the code of the content for my portfolio page:

<!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">

<title>Untitled Document</title>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js"></script>

<script type="text/javascript">
var flashvars = {};
flashvars.galleryURL = "gallery.xml";
var params = {};
params.allowfullscreen = false;
params.allowscriptaccess = "always";
params.bgcolor = "262626";
swfobject.embedSWF("simpleviewer.swf", "flashContent", "740", "486", "9.0.124", false, flashvars, params);


<div id="flashContent">SimpleViewer requires JavaScript and the Flash Player. 
<a href="http://www.adobe.com/go/getflashplayer/">Get Flash.</a></div>
<P><IMG SRC="http://www.snelgoed.nl/Luka/images/move.jpg" /></P>