Hi Atisoft,
I don't suggest using <article> elements for your Outer Body Wrapper. Instead, consider the <section> element. For reasoning, see this: http://html5doctor.com/the-article-element/
That said, if you have a problem with missing headings, it is likely because of an issue in your theme.skin or because you have the "Show Title?" checkbox unchecked in the module's general settings.
Hope this helps.