nixCraft

I have installed and configured squirrelmail webmail on RH9 using tarballs . the problems is i am able to login but once i login I am not getting the interface its jus giving me a blank white page.

On checking error logs it gives me " Cannot re-assign $this in /home/squirrelmail/html/class/mime/Message.class.php on line 183"

My message.class.php file is as below:

vi mime.class.php

/**
* mime.class
*
* Copyright (c) 2003 The SquirrelMail Project Team
* Licensed under the GNU GPL. For full terms see the file COPYING.
*
* This contains functions needed to handle mime messages.
*
* $Id: mime.class.php,v 1.40 2002/12/31 12:49:29 kink Exp $
*/

require_once(SM_PATH . 'class/mime/Rfc822Header.class.php');
require_once(SM_PATH . 'class/mime/MessageHeader.class.php');
require_once(SM_PATH . 'class/mime/AddressStructure.class.php');
require_once(SM_PATH . 'class/mime/Message.class.php');
require_once(SM_PATH . 'class/mime/SMimeMessage.class.php');
require_once(SM_PATH . 'class/mime/Disposition.class.php');
require_once(SM_PATH . 'class/mime/Language.class.php');
require_once(SM_PATH . 'class/mime/ContentType.class.php');

?>

how can I make my squirrelmail work

TIA
Taruvinga