HELP probleme de script

<?php

 
  require_once('config.php');

 
  $connection_string = $config['dbdriver'] . ":dbname=" .

                       $config['database'] . ";host=" .

					   $config['hostname'];

 
  try

  {

    $connection = new PDO($connection_string,

                          $config['username'],

	     			      $config['password']);

  }

  catch(PDOException $e)

  {

    die($e->getMessage());   

  }

 
  $id = intval($_GET['id']);

 
  $stmt = $connection->prepare("SELECT offre.offre_ref, offre.offre_nomoper, offre.offre_desc, offre.offre_datelimit, offre.offre_datecreat, proced.proced_type, service.service_nom, service.service_email FROM offre, proced, service WHERE offre.fk_service = service.service_pk AND offre.fk_proced = proced.proced_pk AND offre.offre_pk = :id");

  $stmt->bindParam(":id", $id);

  $stmt->execute();

 
  $offre = $stmt->fetch(PDO::FETCH_NUM);

 
?>

<?php

 
  require_once('config.php');

 
 
 
  @$cnx = mysql_connect(localhost, $config['username'], $config['password']) ;

if ( $cnx == 0 )	{

 	/* :-( database is out of order */

 	die ("<P><H2>".$txt[3]."</H2></P>\n<P>".$txt[4]."</P>\n") ;

}

 
if ( mysql_select_db(sta_mairie, $cnx) == false )

	die ("<P><H2>".$txt[3]."</H2></P>\n<P>".$txt[39]."</P>\n") ;

 
 
  $id = intval($_GET['id']);

 
  $stmt = mysql_prepare("SELECT offre.offre_ref, offre.offre_nomoper, offre.offre_desc, offre.offre_datelimit, offre.offre_datecreat, proced.proced_type, service.service_nom, service.service_email FROM offre, proced, service WHERE offre.fk_service = service.service_pk AND offre.fk_proced = proced.proced_pk AND offre.offre_pk = :id");

  mysql_stmt_bind_Param($stmt, ":id", $id);

  mysql_stmt_execute($stmt);

 
  $offre = mysql_fetch(mysql_fetch_row($stmt));

 
?>