Route defined in Silex but 404 error

Silex framework I use in my project and I have a problem.
I defined a road / login that points to my form of authentication to connect to the app but when I do: ipsrv / login (ipsrv being the ip web server) he does not know the road (404 ).

My app.php file (extract):

$app->register(new Silex\Provider\SecurityServiceProvider(), array(
    'security.firewalls' => array(
        'login' => array(
            'pattern' => '^/login',
            'anonymous' => true,
            'form' => array('login_path' => '/login', 'check_path' => '/login_check'),
            'users' => $app->share(function () use ($app) {
                return new Nautilus\DAO\UserDAO($app['db']);
            })
        ),
        'general' => array(
            'pattern' => '^/',
            'anonymous' => false,
            'logout' => true
        ),
    ),
));

My routes.php file (extract):

$app->match('/login', function(Request $request) use ($app) {
    return $app['twig']->render('login.html.twig', array(
        'error'         => $app['security.last_error']($request),
        'last_username' => $app['session']->get('_security.last_username'),
    ));
})->bind('login');