Overriding the FOSUserBundle controllers - symfony

Question

So I read alot about the overriding of templates and such and overriding of bundles in Symfony.
I am using the new Symfony 2.3, I have not tried this in lower versions of Symfony.
I followed the tutorial about overriding bundles in Symfony:
http://symfony.com/doc/2.3/cookbook/bundles/inheritance.html
I followed the tutorial about overriding the controllers of FOSUserBundle, which is the same thing really:
https://github.com/FriendsOfSymfony/FOSUserBundle/blob/master/Resources/doc/overriding_controllers.md
I had a bundle named Acme/WebBundle.
Now I have done the following things:
Created a new bundle named Acme/UserBundle.
Created the file AcmeUserBundle.php in this bundle.
<?php
namespace Acme\UserBundle;
use Symfony\Component\HttpKernel\Bundle\Bundle;
class AcmeUserBundle extends Bundle
{
public function getParent()
{
return 'FOSUserBundle';
}
}
Created the following file structure:
-src
-Acme
-UserBundle
-Controller
RegistrationController.php
-Entity
User.php
-Resources
-translations
-views
AcmeUserBundle.php
In RegistrationController.php I set the namespace to:
namespace Acme\UserBundle\Controller;
Copied the contents of the registration controller of FOSUserBundle to mine.
Added to the beginning of registerAction()
die("message");
Now when I go to the registration form, the default /register route, I don't get a die, everything works fine. It does not see my bundle as a child, nothing is overridden and I've been trying to get it to work for ages hence my question here.
Did I do something wrong?

Answer 1

Remember that you need to add any new bundle to AppKernel::registerBundles() in app/AppKernel.php like this:
$bundles = array(
...
new Acme\UserBundle()
);