在Symfony 2项目中安装Doctrine扩展会导致致命错误

这是一个问题:我没有成功地安装学说扩展交响乐2，特别是时间标记。我遵循这个教程

如何进行:

我在deps文件中添加了这些行:

[gedmo-doctrine-extensions]
   git=http://github.com/l3pp4rd/DoctrineExtensions.git
[Stof-DoctrineExtensionsBundle]
   git=https://github.com/stof/StofDoctrineExtensionsBundle.git
   target=/bundles/Stof/DoctrineExtensionsBundle

然后输入

./bin/vendors install --reinstall

一切都好。

然后激活相关文件中的扩展名

# config.yml
stof_doctrine_extensions:
    default_locale: fr_FR
    orm:
        default:
            timestampable: true

# AppKernel.php    
use Symfony'Component'HttpKernel'Kernel;
use Symfony'Component'Config'Loader'LoaderInterface;
class AppKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = array(
            [...]
            new Stof'DoctrineExtensionsBundle'StofDoctrineExtensionsBundle(),
            [...]
        );
# autoload.php
use Symfony'Component'ClassLoader'UniversalClassLoader;
use Doctrine'Common'Annotations'AnnotationRegistry;
$loader = new UniversalClassLoader();
$loader->registerNamespaces(array(
    'Gedmo'            => __DIR__.'/../vendor/gedmo-doctrine-extensions/lib',
    'Stof'             => __DIR__.'/../vendor/bundles', 
    [...]
    ));

最后，我添加了注释我的实体

/**
 * @var datetime $updatedAt
 *
 * @ORM'Column(name="updated_at", type="datetime")
 * @Gedmo:Timestampable(on="update")
 */
private $updatedAt;

但是我有这个错误:

致命错误:第203行/Symfony/app/cache/dev/appDevDebugProjectContainer.php中找不到类'Gedmo'Timestampable'TimestampableListener'

我哪里做错了?