CakePHP 1.3 - RequestHandler->respondAs(js) not working in beforeFilter

["starchild.no1"]

Hi all,

I'm doing an ajax update to see if username exsist.. However when I
use the standard RequestHandler markup in my AppController or Users
Controller beforeFilter
------------------------------------------------------------------------------------
function beforeFilter(){
if ($this->RequestHandler->isAjax())
 {
 Configure::write('debug', 0);
 $this->disableCache();
 $this->RequestHandler->respondAs('js');
 $this->viewPath = $this->params['controller'];
 $this->viewPath .= "/js";
 }
}
--------------------------------------------------------------------------------------
My Content-Type come back as text/html in my headers when viewed in
firebug.. And my hidden divs does not show giving me notice if
username taken or exist.

But when i put:

$this->RequestHandler->respondAs('js');
-----------------------------------------------------------------------------------------------
in my available action:

function available() {

$this->RequestHandler->respondAs('js');

if (!empty($this->params['form']['slug'])) {
  if ($this->User->hasAny(array('slug' => $this->params['form']
['slug'])))
{
 $this->message('warning', "Username '{$this->params['form']['slug']}'
already in use. Please try another one.");
 }
 $this->message('success', "Username '{$this->params['form']['slug']}'
is available.");
    }
    else
    {
      $this->message('warning', 'Please enter a username.');
    }
}
-----------------------------------------------------------------------------------------------------

then my Content-Type in my headers read text\javascript and everything
works fine??

Can anyone suggest what could be causing this?

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