Blog does not show up in top nav

On this site http://www.beverlyhaberman.com the blog page does not show up in the top nav.
The page is accessible at http://www.beverlyhaberman.com/blog, and can be viewed from a link on the home page. It is set in correctly in the Readings Settings, and in the menu page

I’ve tried everything I know to get it to show up in the top nav. What am I missing?

You haven’t selected the primary menu from the drop down, custom menus don’t appear unless the select box has a menu selected.

Wow! That was easy! Many thanks Chris!