Problemme PHP/MSQL

Bonjour,

voila j'ai fais le script suivant (grace à sdz )

et il ne marche pas ^^

<?php 

if (isset ($_POST['email']) AND isset($_POST['nom']) AND isset($_POST['prenom'])) 
{

if ($_POST['email'] != "" AND $_POST['nom'] != "" AND $_POST['prenom'] != "") 
{
		mysql_connect("localhost", "root");
        mysql_select_db("coursphp");
		$email = mysql_real_escape_string(htmlspecialchars($_POST['email']));
        $nom = mysql_real_escape_string(htmlspecialchars($_POST['nom']));
		$prenom = mysql_real_escape_string(htmlspecialchars($_POST['prenom']));
		mysql_query("INSERT INTO newsletter VALUES('', '', '$email', '$nom', '$prenom')");
		mysql_close();
    }
	}
	?>
<form action="test2.php" method="post" >
<p> Nom : <input type="text" name="nom"><br/>
Prenom : <input type="text" name="email"><br/>
</p>
<input type="submit" value="Envoyer" />
</form>
<?php
mysql_connect("localhost", "root");
        mysql_select_db("coursphp");

if (isset ($_POST['email']) AND isset($_POST['nom']) AND isset($_POST['prenom'])) 
{
    $email = addslashes($_POST['email']);
    $nom = addslashes($_POST['nom']);
	$prenom = addslashes($_POST['prenom']);

    if ($_POST['id_news'] == 0)
    {

        mysql_query("INSERT INTO news VALUES('', '', '" . $email . "', '" . $nom . "', '" . $prenom . "')");
    }
    else
    {
        $_POST['id_news'] = addslashes($_POST['id_news']);

        mysql_query("UPDATE news SET email='" . $email . "', nom='" . $nom . "', prenom='" . $prenom . "', WHERE id='" . $_POST['id_news'] . "'");
    }
}
 
if (isset($_GET['supprimer_news'])) 
{
    $_GET['supprimer_news'] = addslashes($_GET['supprimer_news']);
    mysql_query('DELETE FROM newsletter WHERE id=\'' . $_GET['supprimer_news'] . '\'');
}
?>
<table><tr>
<th>Modifier</th>
<th>Supprimer</th>
<th>Nom</th>
<th>Email</th>
</tr>
<?php

		
$reponse = mysql_query('SELECT * FROM newsletter ORDER BY id DESC');

while ($donnes = mysql_fetch_array($reponse)); 
{
?>
<tr>
<td><?php echo '<a href="rediger_news.php?modifier_news=' . $donnes['id'] . '">'; ?>Modifier</a></td>
<td><?php echo '<a href="liste_news.php?supprimer_news=' . $donnes['id'] . '">'; ?>Supprimer</a></td>
<td><?php echo stripslashes($donnes['nom']); ?></td>
<td><?php echo stripslashes($donnes['email']); ?></td>
</tr>
<?php
} 
mysql_close();
?>

Ca m'affiche l'erreur suivante : Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in C:\wamp\www\Nouveau dossier\test2.php on line 64

la ligne 64 correspond à

while ($donnes = mysql_fetch_array($reponse)); 

merci de m'aider ça fais 20 minutes que je cherche l'erreur et je trouve pas ^^