symfony 2 , pagination - symfony

Question

I'm just started working with Symfony2 and I have some problems with Pagination.
I have this code in my Account class:
public function indexAction($page)
{
$session = $this->get('session');
if ($session->get('valid')=='true') {
$em = $this->getDoctrine()->getManager();
$entities = $em->getRepository('ProjectCRMBundle:Account')->findAll();
$user = new Account();
$form = $this->container->get('form.factory')->create(new AccountType());
$total = $this->getDoctrine()->getRepository('ProjectCRMBundle:Account')->createQueryBuilder('p')->getQuery()->getResult();
/* total of résultat */
$total_users = count($total);
$users_per_page = 1;
$last_page = ceil($total_users / $users_per_page);
$previous_page = $page > 1 ? $page - 1 : 1;
$next_page = $page < $last_page ? $page + 1 : $last_page;
/* résultat à afficher*/
$entities = $this->getDoctrine()->getRepository('ProjectCRMBundle:Account')->createQueryBuilder('p')->setFirstResult(($page * $users_per_page) - $users_per_page)->setMaxResults(1)->getQuery()->getResult();
return $this->render('ProjectCRMBundle:Account:index.html.twig', array(
'entities' => $entities,
'last_page' => $last_page,
'previous_page' => $previous_page,
'current_page' => $page,
'next_page' => $next_page,
'total_users' => $total_users,
'form' => $form->createView(),
'user' => $user,
));
return $this->render('ProjectCRMBundle:Account:index.html.twig');
} else {
return $this->redirect($this->generateUrl('user_login'));
}
}
/**
* Creates a new Account entity.
*
*/
public function createAction(Request $request)
{
$entity = new Account();
$form = $this->createForm(new AccountType(), $entity);
$form->bind($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getManager();
$em->persist($entity);
$em->flush();
return $this->redirect($this->generateUrl('account_show', array('id' => $entity->getId())));
}
return $this->render('ProjectCRMBundle:Account:new.html.twig', array(
'entity' => $entity,
'form' => $form->createView(),
));
}
without forgetting the path on account.yml
account:
pattern: /{page}
defaults: { _controller: "ProjectCRMBundle:Account:index" , page: 1 }
At first look, it seems to work, but after trying to add a new account, I got this message:
LIMIT argument offset=-1 is not valid
Can anyone solve my problem?