Call to a member function def() on a non-object

При переносе старого сайта с хостинга на локальный сервер, при входе в админку выдаёт:

Fatal error: Call to a member function def() on a non-object in Z:\home\finmonster.org\www\docs\administrator\index.php on line 172

if ( $_VERSION->SITE == 1 && @$mosConfig_admin_expired === '1' ) {
            $file   = $mainframe->getPath( 'com_xml', 'com_users' );
            $params &= new mosParameters( $my->params, $file, 'component' );

            $now    = time();

            // expired page functionality handling
            $expired        = $params->def( 'expired', '' );  //172 line
            $expired_time   = $params->def( 'expired_time', '' );

            // if now expired link set or expired time is more than half the admin session life set, simply load normal admin homepage
            $checktime = ( $mosConfig_session_life_admin ? $mosConfig_session_life_admin : 1800 ) / 2;
            if (!$expired || ( ( $now - $expired_time ) > $checktime ) ) {
                $expired = 'index2.php';
            }
            // link must also be a Joomla link to stop malicious redirection
            if ( strpos( $expired, 'index2.php?option=com_' ) !== 0 ) {
                $expired = 'index2.php';
            }

            // clear any existing expired page data
            $params->set( 'expired', '' );
            $params->set( 'expired_time', '' );

            // param handling
            if (is_array( $params->toArray() )) {
                $txt = array();
                foreach ( $params->toArray() as $k=>$v) {
                    $txt[] = "$k=$v";
                }
                $saveparams = implode( "\n", $txt );
            }

            // save cleared expired page info to user data
            $query = "UPDATE #__users"
            . "\n SET params = " . $database->Quote( $saveparams )
            . "\n WHERE id = " . (int) $my->id
            . "\n AND username = " . $database->Quote( $my->username )
            . "\n AND usertype = " . $database->Quote( $my->usertype )
            ;
            $database->setQuery( $query );
            $database->query();
        }

Сайт написан на Joomla 1.0.15. Что делать