Base de donnees sous wampserver

mysql_query("INSERT INTO `test`.`informationsformulaire` (`id`, `prenom`, `nom`, `email`, `telephone`, `objet`, `message`) VALUES (NULL,htmlentities('$_POST[\'prenom\']'),htmlentities('$_POST[\'nom\']'),htmlentities('$_POST[\'email\']'),htmlentities('$_POST[\'telephone\']'),htmlentities('$_POST[\'objet\']'),htmlentities('$_POST[\'message\']'))") or die(mysql_error());

<!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>monsite-----traitement</title>
       <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
	   
   </head>
   <body>
		<?php
			//recupération des valeurs postées
			$prenom=mysql_escape_string($_POST['prenom'];
			$nom=mysql_escape_string($_POST['nom'];
			$email=mysql_escape_string($_POST['email'];
			$telephone=mysql_escape_string($_POST['telephone'];
			$objet=mysql_escape_string($_POST['objet'];
			$message=mysql_escape_string($_POST['message'];
			
		    mysql_connect("localhost","root","");
			 //deja la il te manque la selection de la base
			 mysql_select_db('test');
			//ensuite mets '' pour VALUES de l'id au lieu de NULL 
			mysql_query("INSERT INTO informationsformulaire (id,prenom,nom,email,telephone,objet,message) VALUES ('','".$prenom."','".$nom."','".$email."','".$telephone."''".$objet."''".$message."') ") or die(mysql_error());
			
			//mysql_close();	

		?>
		
		
		<?php
			//si c'est dans le mêm script ne te reconnectes pas deux fois
			//mysql_connect("localhost","root",""); 
			//mysql_select_db("test"); 							 
			$reponse = mysql_query("SELECT prenom FROM informationsformulaire"); 							 
			while ($donnees = mysql_fetch_array($reponse) )	
				{ echo $donnees['prenom'];
		?>
		<br>
		<?php
				}							 
			mysql_close(); 
		?>  
   </body>
</html>