problems while upgrading from cakephp 1.2.5 to 2.5.3

I have migrated from  cakephp 1.2.5 to Cake 2.5.3 by installing new cake, importing old database and importing files.  I have made changes to file as per the migration guides but I am getting this error:Error: syntax error, unexpected '$this' (T_VARIABLE), expecting function (T_FUNCTION)
File: /home/dallasrosie/public_html/musicthatjumpedtheshark.com/app/Controller/GroupsController.php
Line: 43

here is line 43 of GroupsController.php:

  // Pass through the request and response objects 

// AND declare the visibility of the method

public function __construct($request = null, $response = null)

{

    parent::__construct($request, $response);

}

        $this->Layout = 'home';

        $this->PageTitle = 'Music That Jumped the Shark ~ groups';

        

        // get the random ad links

        include('includes/ad_selection.php');

        $this->set('top_ads', $_ads_top_link);

        $this->set('side_ads', $_ads_side_link);

        $this->top_ad_links = $_ads_top_link;

        $this->side_ad_links = $_ads_side_link;

    }

    

    // DEBUG

    public function under_construction()

    {

        $this->layout = 'temp';

        

    }

I am getting this message on all pages like this: musicthatjumpedtheshark.com/groups   ..../genres ...

and on the blogs/   page I get this error?

Error: Call to a member function parseAccept() on a non-object
File: /home/dallasrosie/public_html/musicthatjumpedtheshark.com/lib/Cake/Controller/Component/RequestHandlerComponent.php
Line: 157

here is line 157:

   if (!$resp->is_valid)

            {

                # set the error code so that we can display it

                $comment_errors['captcha'] = '<span class="error">incorrect response</span>';

                $ret = false;

            }

        }

        

        // validate comment

        if($data['comment'] == '')

        {

            $comment_errors['comment'] = '<span class="error">comment may not be empty</span>';

            $ret = false;

        }

Please help.  I don't know if I should be using some kind of shell to upgrade - I don't know how to use them yet.  Any suggestions are GREATLY appreciated.

Thank you.

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