Админка 1.10.2 белая страница ошибка 500

[Mon Aug 26 09:01:10 2013] [error] [client xx.xx.xx.166] PHP Fatal error: require(): Failed opening required '../core/cms.php' (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/test/data/www/SITE.com/admin/index.php on line 24

Пишет, что не может подгрузить ядро core/cms.php.
Разберитесь, почему. Права на файл и папку? .htaccess?

    header('Content-Type: text/html; charset=utf-8');
 
	session_start();
 
	define("VALID_CMS", 1);
	define("VALID_CMS_ADMIN", 1);
 
	define('PATH', $_SERVER['DOCUMENT_ROOT']);
    define('HOST', 'http://' . $_SERVER['HTTP_HOST']);
 
	require("../core/cms.php");
	require("includes/cp.php");
 
	require("../includes/tools.inc.php");
 
    $inCore = cmsCore::getInstance();

	require("../core/cms.php");
	require("includes/cp.php");
	require("../includes/tools.inc.php");

замените на

	require(PATH.'/core/cms.php');
	require(PATH.'/includes/cp.php');
	require(PATH.'/includes/tools.inc.php');