scuse **No Sms** oublié!!!

ps:je rappel que j'ai fait ce script just pour comprendre le fonctionnement d'une chatbox pas pour en faite une toute belle...
<html>
<?php
if(isset($_POST['pseudo']) AND isset($_POST['message']))
{
if($_POST['pseudo']!=NULL AND $_POST['message']!=NULL)
{
mysql_connect("localhost","root","");
mysql_select_db("chat");
$message = htmlentities ($_POST['message']);
$pseudo = htmlentities ($_POST['pseudo']);
mysql_query("INSERT INTO chat('ID', 'pseudo', 'message');
VALUES('', '$pseudo', '$message')");
mysql_close();
}
}
?>
<form action="chat.php" method="post">
pseudo:<input type="text" name="pseudo"/><br/>
message:<input type="text" name="message"/><br/>
<input type="submit" value="valider"/>
</form>
<?php
mysql_connect("localhost","root","");
mysql_select_db("chat");
$reponse=mysql_query("SELECT * FROM chat ORDER BY ID DESC LIMIT 0‚10");
while($donnee= mysql_fetch_array($reponse) )
mysql_close();
{
?><p><strong><?php echo $donnee['pseudo'];?></strong>:<?php echo $donnee['message'];?></p>
<?php
}
?>
</html>
merci d'avance!!