Fatal error
 

Почему возникает такая ошибка при:

<?php
if (!defined('_SAPE_USER')){
define('_SAPE_USER', '9c05318fa079d6485eafbbeeb9ff6525');
}
require_once($_SERVER['DOCUMENT_ROOT'].'/'._SAPE_USER.'/sape.php');
$sape = new SAPE_client();
echo $sape->return_links();

$sape_articles = new SAPE_articles();
echo $sape_article->return_announcements();
?>

Какая такая?

Fatal error: Call to a member function return_announcements() on a non-object in ........... on line 11

$sape_articles = new SAPE_articles();
echo $sape_articles->return_announcements();

Да, спасибо.