Warning: require_once(LdapAuthentication.php) [function.require-once]: failed to open stream: No such file or directory in C:\Program Files\xampp\htdocs\wiki\LocalSettings.php on line 128 

Fatal error: require_once() [function.require]: Failed opening required 'LdapAuthentication.php' (include_path='.;C:\Program Files\Apache Group\Apache2\htdocs\wiki;C:\Program Files\Apache Group\Apache2\htdocs\wiki/includes;C:\Program Files\Apache Group\Apache2\htdocs\wiki/languages') in C:\Program Files\xampp\htdocs\wiki\LocalSettings.php on line 128