Cakephp 2 acl not denying any actions

I followed the tutorial and didn't get any errors but acl is allowing all actions for all users.I checked with aclmanager all permissions are being displayed correctly.I have added parent::beforeFilter(); in all controllers.Am I missing something? Can anybody please help me out with this?

This is my initDB function

public function initDB() {  $group = $this->User->Group;    $group->id = 1;  $this->Acl->allow($group, 'controllers');    $group->id = 2;  $this->Acl->deny($group, 'controllers');  $this->Acl->allow($group, 'controllers/Employees');     $group->id = 3;  $this->Acl->deny($group, 'controllers');  //we add an exit to avoid an ugly "missing views" error message  echo "all done";   }

This is my beforefilter function in appcontroller

function beforeFilter(){  $this->Auth->authorize = array(      'Controller',      'Actions' => array('actionPath' => 'controllers')      );  $this->Auth->authenticate = array('Form' => array('fields' => array('username' =>'username', 'password' => 'password')));      $this->Auth->loginAction = array('controller' => 'users', 'action' => 'login');  $this->Auth->logoutRedirect = array('controller' => 'users', 'action' => 'login');  $this->Auth->loginRedirect = array('controller' => 'employees', 'action' =>   'employee_list');   }

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