ErrorException [ Fatal Error ]: Class 'Config_Database_Writer' not found

APPPATH/kohana/modules/database/classes/Kohana/Config/Database.php [ 13 ]

 8  * @author     Kohana Team
 9  * @copyright  (c) 2012 Kohana Team
10  * @license    http://kohanaframework.org/license
11  */
12 class Kohana_Config_Database extends Config_Database_Writer
13 {
14 
15 }

1. {
   Fatal error: Call to undefined function __() in /var/www/19218-saniyaw/data/www/board.flexi-soft.in.ua/oc/kohana/system/views/kohana/error.php on line 64