PHP Fatal error: require_once(): Failed opening required waktu diupload di hosting

Permisi kakak... Nubie mau tanya masalah config yg sy sudah buat,waktu dijalanin di localhost udah jalan dengan lancar, terus sy upload ke hosting dengan config seperti ini

 <?php
$page = (isset($_GET['page']) && $_GET['page']) ? $_GET['page'] : '';

// this configuration path for website
define('PATH', '/home/folder_user/public_html/demo/cms/'); // isi path dari website
define('SITE_URL', PATH . 'index.php');
define('POSITION_URL', PATH . '?page=' . $page);

// this configuration for database website
define('DB_HOST', 'localhost'); // host yang di gunakan
define('DB_USERNAME', 'root'); // username host
define('DB_PASSWORD', ''); // password host
define('DB_NAME', 'db_test'); // database yang di gunakan
?>

Untuk akses indexnya code nya sebagai berikut

 <?php
session_start();
// define configurations
define('ROOT', dirname(__FILE__));
define('DS', DIRECTORY_SEPARATOR);

// now require file
require_once "config.php";
require_once "library/database.class.php";
require_once "library/model.class.php";
require_once "library/view.class.php";
require_once "library/controller.class.php";

function __autoload($className) {

    $fileName = str_replace("\\", DS, $className) . '.php';

    if(!file_exists($fileName)) {

        return false;
    }

    include $fileName;
}

$page = (isset($_GET['page']) && $_GET['page']) ? $_GET['page'] : 'home';
$controller = ROOT . DS . 'modules' . DS . 'controllers' . DS . $page .'Controller.php';

if(!file_exists($controller)) {
print_r($controller);
    require_once $controller;
    $action = (isset($_GET['action']) && $_GET['action']) ? $_GET['action'] : 'index';
    $controllerName = ucfirst($page). 'Controller';

    $obj = new $controllerName();

    if(method_exists($obj, $action)) {

        $args = array();
        if(count($_GET) > 2){
            $parts = array_slice($_GET, 2);

            foreach ($parts as $part) {
                array_push($args, $part);
            }
        }
        call_user_func_array(array($obj, $action), $args);

    }else die('Action Not Found !');

}else print_r($controller);

Terus pesan errornya gini

 [21-Feb-2017 06:11:14 Asia/Jakarta] PHP Warning:  require_once(/home/folder_user/public_html/demo/cms/modules/controllers/homeController.php): failed to open stream: No such file or directory in /home/folder_user/public_html/demo/cms/index.php on line 32
[21-Feb-2017 06:11:14 Asia/Jakarta] PHP Fatal error:  require_once(): Failed opening required '/home/folder_user/public_html/demo/cms/modules/controllers/homeController.php' (include_path='.:/opt/alt/php56/usr/share/pear:/opt/alt/php56/usr/share/php') in /home/folder_user/public_html/demo/cms/index.php on line 32

Padahal didalam foldernya udah ada filenya, Salahnya yg dimana ya kakak terima kasih sebelumnya.