Thread:Project:Support desk/Issue during protecting a page

We are having the following Mediwiki version MediaWiki 1.21.2 PHP 5.3.27 (cgi-fcgi)

MySQL 5.5.32

We are facing an issue during protecting a page. When we apply the protection on a category Page it is not getting cascaded to all the pages belonging to it. Even after checking the checkbox "Protect pages included in this page (cascading protection)". On reopening the Protection config screen the checkbox gets automatically unchecked,