[Plugin: Graceful Sidebar Plugin] Not working in custom post type

The custom fields graceful_title and graceful_content work just fine in regular posts, but those custom fields are not working in a custom post type I created (“Articles”) — the content appears in the main column rather than in the sidebar.

I’ve just started working with custom post types so may be missing something I need to configure to get this working right.

Any help would really be appreciated. Thanks very much.

https://www.ads-software.com/extend/plugins/graceful-sidebar-plugin/