Thread:Project:Support desk/upgrading from 1.1.15 with bridge to smf

I have 1.1.15 installed in a subdirectory to mainwebsite studentforums.biz ie studentforums/wiki/ php is 5.3.2 when I run update.php I get this error message PHP Warning: require_once(./extensions/Auth_SMF.php): failed to open stream: No such file or directory in /var/www/studentforums/wiki/LocalSettings.php on line 141 PHP Fatal error: require_once: Failed opening required './extensions/Auth_SMF.php' (include_path='/var/www/studentforums/wiki:/var/www/studentforums/wiki/includes:/var/www/studentforums/wiki/languages:.:/usr/share/php:/usr/share/pear') in /var/www/studentforums/wiki/LocalSettings.php on line 141

I think I need to edit update.php with the right path but how do I do this?