Can't get Superfeedr callback response in CakePHP

I already added this URL to my subscribers list: http://push-pub.appspot.com/

BTW, I also setting well the callback URL, like: http://online-domain.com/data/forward

My controller code:

public function forward() {    $this->autoRender = false    CakeLog::write('debug', 'Callback work!!');    CakeLog::write('debug', json_encode($this->request->data));}

But, in my debug.log:

2013-12-23 06:06:47 Debug: Callback work!!2013-12-23 06:06:47 Debug:2013-12-23 06:07:38 Debug: Callback work!!2013-12-23 06:07:38 Debug:2013-12-23 06:12:59 Debug: Callback work!!2013-12-23 06:12:59 Debug:

I no idea why $this->request->data not working, it should get the callback data from superfeedr. I want get callback from superfeedr. Any guys know what was I wrong? Thanks you in advance.