Erreur php help!!!

Bonjour,

J'ai créer deux pages en php pour permettre aux membres de laisser un lien pour faire de la pub
avec du SQL. Jusqu'à ici tout fonctionne mais lorsque je met le bout de code php pour l'espace
membre j'obtient sa :

Warning: require_once(../membres/config.php) [function.require-once]: failed to open stream: No such file or directory in D:\Program Files\EasyPHP 2.0b1\www\monsite\membres\pub\lien.php on line 3

Fatal error: require_once() [function.require]: Failed opening required '../membres/config.php' (include_path='.;D:/Program Files/EasyPHP 2.0b1\php5\pear\') in D:\Program Files\EasyPHP 2.0b1\www\monsite\membres\pub\lien.php on line 3

Que faire pour arranger sa?

Code lien.php

<?php
session_start();
require_once('../membres/config.php');
$titre_page='le titre de la page';
include_once('../membres/haut.php');
?>
<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_rs = "localhost";
$database_rs = "db";
$username_rs = "monnom";
$password_rs = "pass";
$rs = mysql_pconnect($hostname_rs, $username_rs, $password_rs) or trigger_error(mysql_error(),E_USER_ERROR); 
?>
<?php
$currentPage = $_SERVER["PHP_SELF"];

$maxRows_pub = 10;
$pageNum_pub = 0;
if (isset($_GET['pageNum_pub'])) {
  $pageNum_pub = $_GET['pageNum_pub'];
}
$startRow_pub = $pageNum_pub * $maxRows_pub;

mysql_select_db($database_rs, $rs);
$query_pub = "SELECT * FROM pub";
$query_limit_pub = sprintf("%s LIMIT %d, %d", $query_pub, $startRow_pub, $maxRows_pub);
$pub = mysql_query($query_limit_pub, $rs) or die(mysql_error());
$row_pub = mysql_fetch_assoc($pub);

if (isset($_GET['totalRows_pub'])) {
  $totalRows_pub = $_GET['totalRows_pub'];
} else {
  $all_pub = mysql_query($query_pub);
  $totalRows_pub = mysql_num_rows($all_pub);
}
$totalPages_pub = ceil($totalRows_pub/$maxRows_pub)-1;

$queryString_pub = "";
if (!empty($_SERVER['QUERY_STRING'])) {
  $params = explode("&", $_SERVER['QUERY_STRING']);
  $newParams = array();
  foreach ($params as $param) {
    if (stristr($param, "pageNum_pub") == false && 
        stristr($param, "totalRows_pub") == false) {
      array_push($newParams, $param);
    }
  }
  if (count($newParams) != 0) {
    $queryString_pub = "&" . htmlentities(implode("&", $newParams));
  }
}
$queryString_pub = sprintf("&totalRows_pub=%d%s", $totalRows_pub, $queryString_pub);
?>