Add a custom header for BP Social

I watched the following tutorial by Tammie at on how to add a custom header for the BP Default Theme.

This works perfect on BP Default, but I can't get it to work in BP Social. In the Social theme dashboard: Appearance > Header I uploaded a 960 x 150 image.

When I visit the public site it does not add the header image across the very top like in BP Default, but the header winds up like a blog header down below the navigation tabs: home, activity, community, about.

Am I missing something here?