Symfony2 Demo配置失败：报错

我想添加一个页面，访问链接为/hello

配置步骤如下：
1.在app/AppKernel.php文件中加入代码：

public function registerBundles() { $bundles[] = new Acme\HelloBundle\AcmeHelloBundle(); return $bundles; }

acme_hello: resource: "@AcmeHelloBundle/Resources/config/routing.yml" prefix: /

hello: pattern:  /hello/{name} defaults: { _controller: AcmeHelloBundle:Hello:index }

namespace Acme\HelloBundle\Controller;

use Symfony\Component\HttpFoundation\Response;

class HelloController { public function indexAction() { return new Response("Hello World"); } }

Cannot import resource "D:/xampp/htdocs/Symfony/app/config\routing.yml" from "D:/xampp/htdocs/Symfony/app/config/routing_dev.yml". (Unable to parse at line 2 (near "resource:"@AcmeHelloBundle/Resources/config/routing.yml"").)