class cannot be loaded

Hello all. I write simple example from documentation - https://docs.phalcon.io/en/latest/reference/tutorial.html#creating-a-project, but when i start looking in browser, phalcon get error - Exception: IndexController handler class cannot be loaded.

<?php
 try {
    $loader = new \Phalcon\Loader();
    $loader->registerDirs(array(
        '../app/controllers/',
        '../app/models/'
    ));

    $di = new Phalcon\DI\FactoryDefault();

    $di->set('view', function () {
        $view = new \Phalcon\Mvc\View();
        $view->setViewsDir('../app/views');
        return $view;
    });

    $di->set('url', function(){
        $url = new Phalcon\Mvc\Url();
        $url->setBaseUri('/phalcon/');
        return $url;
    });

    $application = new Phalcon\Mvc\Application($di);

    echo $application->handle()->getContent();

} catch (\Phalcon\Exception $e) {
    echo 'Exception: ', $e->getMessage();
}

```php<?php class IndexController extends \Phalcon\Mvc\Controller {

public function indexAction()
{
    echo '<h1>Hello</h1>';
}

}

What I'm doing wrong? Thanks.

P.S. Using xampp 1.8.2.