I am making a custom helper that needs access to session data and to the 
Html helper.  Following the manual's instructions I am including

   var $helpers

in my new helper like this:


   class SecureHtmlHelper extends Helper {
      var $helpers = array('Html', 'Session');
         function link($title, $url) {
            $actionAcoList = $session->read('ActionAcoList');
            if (in_array($url, $actionAcoList)) {
            return $html->link($title, $url);
         }
      }
   }


I also have Session and Html helpers included in the parent controller 
along with my new helper.

When I call my new helper I get the following error:


Fatal error: Call to a member function on a non-object in 
/home/web_servers/prototype/dev/app/views/helpers/secure_html.php on line 5


If I remove the Session related code then I get a similar error for the 
Html helper.  Having followed the manual's instructions I am at a bit of 
a loss.

There is a thread in the group on the same topic, but without a clear 
resolution:

http://groups.google.com/group/cake-php/browse_thread/thread/72fc5c592d40fe7e/

Does anyone have a suggestion as to why this may be happening?

Regards,
Langdon



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