Extension talk:MultiPageExport

Fatal error: Call to a member function getDBKey
After installing this extension the following error message appeared

Fatal error: Call to a member function getDBKey on a non-object in ...\wiki\extensions\MultiPageExport\MultiPageExport.php on line 45

System details: OS Windows, MediaWiki	1.13.3, PHP 5.2.4 (apache2handler) and MySQL 5.0.67-community-nt.