public function preExecute() {

	$user = $this->getUser();  	
	if ( $user->getAttribute('id') != null ) {

		echo $user->getAttribute('id'); 
		$sessUnique = SessionUniquePeer :: retrieveByPk($user->getAttribute('id'));
		$this->forward404Unless($sessUnique);
		
		if ( !$sessUnique->updateSession($user) )
			$this->executeLogout();
	}
  }