How should I do CSRF protection in cakephp?

See more:

security

CSRF

CakePHP

Hi,
I am new to cakephp and now I am working on a new project with cakephp by studying. My current doing task is to do CSRF protection for overall project.I have read official cakephp 2 cookbook and I did as explained in that book. But, now I am facing "The request has been black-holed.
Error: The requested address '/admin/accounts/add' was not found on this server." every time the new user add form is submitted.

My code is :
//////////////////////////////////////////////////////////////////////////////////////////////////

public $components = array(
'Security' => array(
'csrfExpires' => '+1 hour'
),
'Search.Prg' => array(
'commonProcess' => array(
'paramType' => 'named',
'filterEmpty' => true
))


);

///////////////////////////////////////////////////////////////////

public function beforeFilter() {
parent::beforeFilter();
$this->layout = 'admin';
$this->Security->blackHoleCallback = '_blackHole';
}

////////////////////////////////////////////////////////////////////

public function _blackHole($error) {
die($error);
}

/////////////////////////////////////////////////////////////////////

By doing so, 'auth' error has appeared.

How should I do?
Please help me.I have googled but it was just the waste of time.I have no way to do.
Please help me.