Fatal error: require once()/oc

During installation of mediawiki 1.16, you can have the bug:

 Warning: require_once(includes/Defines.php) [function.require-once]: failed to open stream: No such file or directory in /mnt/155/sdb/4/5/yoursite/Wiki1.16/config/index.php on line 42

Fatal error: require_once [function.require]: Failed opening required 'includes/Defines.php' (include_path='/mnt/155/sdb/4/5/yoursite/include:.:/usr/php5/lib/php') in /mnt/155/sdb/4/5/yoursite/Wiki1.16/config/index.php on line 42

This is due to your server which could not accept the   function.

Solucion
The only solution for using the 1.16 is: replace IN EVERY FILES this:

per

Exemple
Remplaçatz

per