HTML image problème

Voici mon code:

HTML:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" >
<head>
<title>Phenix games</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<link rel="stylesheet" media="screen" type="text/css" title="Phenix" href="design.css" />
</head>
<body>
<div id="en_tete">

</div>

<div id="menu">
<div class="element_menu">
<h3>-----Menu------</h3>
<ul>
<li><a href="">Home</a></li>
<li><a href="">Jeux</a></li>
<li><a href=""></a></li>
<li><a href=""></a></li>
<li><a href=""></a></li>
</ul>
</div>
<br>
<div class="element_menu">
<h3>------Liens------</h3>
<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>
</div>
<br>
<div class="element_menu">
<br>
<br>
<br>
<br>
</div>
</div>

<div id="corp">
<h1>Bienvenue!</h1>

<a>

</a>
</div>
<p>Venez visiter le CBNA!</p>
<div id="pied_de_page">
<br><br>
</div>

</body>
</html>

CSS:

body
{
width: 760px;
margin: auto;
margin-top: 20px;
margin-bottom: 20px;
background-image: url("images/fon.jpg");
}

#en_tete
{
width: 760px;
height: 100px;
background-image: url("images/bann.jpg");
background-repeat: no-repeat;
margin-bottom: 10px;
}

#menu
{
float: left;
width: 120px;
padding: 5px;
background-color: gray;
border: 2px solid silver;
}

.element_menu
{
background-color: gray;
background-image: url("images/haut.jpg");
background-repeat: repeat-x;

border: 2px solid silver;

margin-bottom: 5px;
}

.element_menu a
{
color: black;
text-decoration: none;
display: block;
width: 90px;
margin-left: 0px;
margin-top: 1px;;
}

.element_menu li
{
border: solid 1px;
margin-top: 1px;
width: 90px;
list-style-type: none;
}

.element_menu a:hover
{
background-color: #a1a1a1;
color: red;
text-decoration: none;
width: 90px;
}

#corp
{
margin-left: 140px;
margin-bottom: 20px;
padding: 5px;
overflow: scroll;
height: 600px;

color: #B3B3B3;
background-color: #808080;
background-image: url("images/haut.jpg");
background-repeat: repeat-x;

border: 2px solid silver;

color: black;
}

#pied_de_page
{
padding: 5px;

text-align: center;

color: #B3B3B3;
background-color: #808080;
background-image: url("images/haut.jpg");
background-repeat: repeat-x;

border: 2px solid black;
}

ul
{
padding: 1px;
margin: 10px;
margin-top: 0px;
}

h3
{
margin-top: 5px;
margin-bottom: 5px;
}

La banière ne s'affiche plus alors qu'elle s'affichait avant, depuis que j' ai changé de nom le dosssier qui contenait mon code et mes images

sdz powaaa! sinon ben je sais pas...moi pour la bannère je fais pas comme ça je let a chaque début de page mon image