I did that but now I have this message.
Warning: require(D:\Hosting\12544493\html/wp-includes/pomo/mo.php) [function.require]: failed to open stream: No such file or directory in D:\Hosting\12544493\html\wp-settings.php on line 76
Fatal error: require() [function.require]: Failed opening required ‘D:\Hosting\12544493\html/wp-includes/pomo/mo.php’ (include_path=’.;C:\php\pear’) in D:\Hosting\12544493\html\wp-settings.php on line 76