Problème d'include

Bonjour,

J'ai un sérieux problème d'include.

Je tente d'afficher la newsletter sur ma page d'accueil, mais impossible!!!... Je dois pour ce faire, inclure le fichier suivant :

<?php
// you can include this form in any page of
// your website as follow:
//
// in this file, provide correct values for:
// $path_to_pmnl
// $list_id newsletter id
// then in your page (need to be a php page)
// add this line :
// include("path/to/this/page/form.php");
// NOTA: your page need to use UTF8 encoding
// put
// <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
// in your html header

//path to phpMyNewsletter base directory
$path_to_pmnl="./";

// newsletter id, leave this empty if you want to list available
// newsletter.

//$list_id = 1;
$list_id = "";

//display archive link (true or false) ?
$display_archive=true;

////////////////////// DO NOT MODIFY /////////////////////

if(file_exists("./".$path_to_pmnl."include/config.php")){
include("./".$path_to_pmnl."include/config.php");
include("./".$path_to_pmnl."include/db/db_".$db_type.".inc.php");
}
include("./".$path_to_pmnl."include/lib/libconfig.php");
include("./".$path_to_pmnl."include/interface.php");
include("./".$path_to_pmnl."include/lib/libnewsletter.php");
include("./".$path_to_pmnl."admin/include/function.php");

if(file_exists("./".$path_to_pmnl."include/config.php")){
print newsletter_list($list_id, true, $display_archive);
} else {
include "./".$path_to_pmnl."include/lang/english.php";
echo error_msg(translate("NEWSLETTER_NOT_YET"));
}

?>

Merci d'avance pour votre aide

Configuration: Windows XP
Internet Explorer 6.0