BUG dos acentos

Eu tô com erro do BUG dos acentos, já botei os codigos q tem na Cria Habbos já procurei em todos os lugares botei aqueles códigos META e não resolve, aqui está meu global.php:

Código:

<?php header("Content-Type: text/html; charset=ISO-8859-1", true);
//Installation files? - Start
if(file_exists('ainstall.php'))
{
   echo 'Go to <a href="install.php">install.php</a>';
   die;
}
if(file_exists('aupdate.php'))
{
   echo 'Go to <a href="update.php">update.php</a>';
   die;
}
//Installation files? - End
define('SEP', DIRECTORY_SEPARATOR);
$dir = str_replace('register'.SEP, '', dirname(__FILE__).SEP);
$dir = str_replace('functions'.SEP, '', $dir);
$dir = str_replace('housekeeping'.SEP, '', $dir);
define('DIR', $dir);
define('DOCUMENT_ROOT', DIR.SEP);
define('INCLUDES', DIR.'inc'.SEP);
define('WWW', 'http://'.$_SERVER['SERVER_NAME']);

session_start();

require_once DOCUMENT_ROOT.'config.php';

$connect = mysql_connect($host, $username, $password) or die("Could not connect to server, error: ".mysql_error());
mysql_select_db($dbname, $connect) or die("Could not connect to database, error: ".mysql_error());

require_once INCLUDES."class.core.php";
require_once INCLUDES."class.users.php";

$core = new Core();
$users = new Users();

require_once DOCUMENT_ROOT.'lang/'.$language.'.php';

define('MAINTENANCE', $core->Maintenance());

if(USERNAME_REQUIRED == TRUE && !isset($_SESSION["username"]))
header("Location: ".WWW."/characters.php");
if(ACCOUNT_REQUIRED == TRUE && !isset($_SESSION["account"]))
header("Location: ".WWW."/index.php");

$sitename = $core->CmsSetting('cms_name');

if(isset($_SESSION["username"]))
{
$username = $core->EscapeString($_SESSION['username']);
if($users->CheckBan($username))
header($users->BanInfo($username));
}

if(MAINTENANCE && !$users->UserPermission('hk_login', $username) && !defined('MAINTENANCE_PAGE'))
header("Location: ".WWW."/maintenance.php");
?>

[/code]

Por favor, preciso de ajuda

Bom, veja estes tutoriais ensinando a consertar:
-https://www.power-pixel.net/t19217-2-geitos-retirar-bug-dos-acentos
-https://www.power-pixel.net/t17521-novometodo-de-retirar-bugs-dos-acentos
-https://www.power-pixel.net/t17816-retirando-erros-acentos-com-jquery

Todos funcionam.

nenhum resolveu vou trocar cms