site de A à Z MVC Dispatcher

Voici Mon Dispatcher

<?php
class Dispatcher{

var request; function \_\_construct(){ $this->request= new Request(); Router::parse(this->request->url,this->request); $controller=this->loadController();
$action = $this->request->action;

if(this->request->prefix){// Si j'ai un prefix $action= $this->request->prefix.'\_'.action;
}
if(!in_array(action ,array\_diff(get\_class\_methods(controller),get_class_methods('Controller')))){
this->errors('Le Controller'.this->request->controller.'n\'a pas de méthode'.$action);
}

call_user_func_array(array(controller,action),$this->request->params);

controller->render(action);

}
function errors($message){

controller = new Controller(this->request);
Controller->Session = new Session(); $controller->e404(message);

}

function loadController()
{
name=ucfirst(this->request->controller).'Controller';
file=ROOT.DS.'controllers'.DS.name.'.php';

require file; $Controller= new $name(this->request);
Controller->Session = new Session(); $Controller->Form = new Form(Controller);
return $Controller;

}
}

?>

si je tape l'url localhost/site/un controleur qui n'existe pas au lieu de me redire vert la page 404 (controller n’existe pas)
il m'affiche l'erreur
Warning: require(C:\wamp\www\site\controllers\FfController.php) [function.require]: failed to open stream: No such file or directory in C:\wamp\www\jackess\core\Dispatcher.php on line 39

Fatal error: require() [function.require]: Failed opening required 'C:\wamp\www\site\controllers\FfController.php' (include_path='.;C:\php5\pear') in C:\wamp\www\jackess\core\Dispatcher.php on line 39

quelqu'un peux m'aider sur cette affaire
Merci à tous et bonne nuit.
NB :localhost/site/ url racine