symfony 2.3 error: autoloader find file but not class - symfony

Question

First, sorry if my english it's not so good.
I readed a lot of questions like the one i have, but any solution works.
The question is that I'm developing a porject in Symfony 2.3, yes, i'm beginner using it...
I've created a 'Userbundle', and i want to display the info profile of an user.
When I access to the correct URL I have the famous message error:
"The autoloader expected class "Mylife\UserBundle\Entity\UserRepository" to be defined in file "D:\www\Symfony/src\Mylife\UserBundle\Entity\UserRepository.php". The file was found but the class was not in it, the class name or namespace probably has a typo."
That's my default controller code:
namespace Mylife\UserBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Mylife\UserBundle\Entity\User;
use Mylife\UserBundle\Form\Frontend\RegisterType;
class DefaultController extends Controller
{
public function profileAction(){
$user_id=1;
$em=$this->getDoctrine()->getEntityManager();
$profile=$em->getRepository('UserBundle:User')
->findProfile($user_id);
return $this->render('UserBundle:Default:profile.html.twig', array( 'profile' => $profile));
}
And my UserRepository.php code:
// src/Mylife/UserBundle/Entity/UserRepository.php
namespace Mylife\UserBundle\Entity;
use Doctrine\ORM\EntityRepository;
class UserRepository extends EntityRepository
{
public function findProfile($user)
{
$em = $this->getEntityManager();
$consult= $em->createQuery('
SELECT u, nk, n
FROM UserBundle:User u
WHERE u.user= :id');
$consult->setParameter('id', $user);
return $consult->getResult();
}
}
I have the same problem when trying to use a form class in the same bundle, but i no see any error in namesapce or class name.
The project structure is:
-src
-Mylife
-UserBundle
....
-Entity
...
-User.php
-UserRepository.php
I'm going mad trying to solve the problem and reading a lot of forums and examples.
I've tryed to dissable APC, to restart Apache, erase the cache, and nothing of this worked.
Thanks a lot!!
Carlos
PD: I'm not sure why appears a piece of code at the top of the error page and why it begins in "getEntityMAnager();..." row... Why is not showing the text code before it?. Image:http://es.tinypic.com?ref=r0s8k5
IMPORTANT: When I generated the entity USer by console, I say "no" when asked to generate repository. May be this is the problem. Any suggestion now?
Thanks again

Answer 1

Try to add this comment in your User entity file:
/**
*
* #ORM\Entity(repositoryClass="YourProject\UserBundle\Entity\UserRepository")
*/
class User
{
...
}
or something like this:
custom repository class in symfony2

Answer 2

Found it!!
It's was a silly mistake. I've began the PHP repository file with
<?
...
and must be
<?php
...
Sorry at all!