Sidebar not showing on one page but apprears on the others

I have a sidebar that shows up on all my other sub pages under a dropdown menu but will not show on one page. All the settings are the same when checking against the pages with working sidebars, the widgets and widget areas on the other sidebars all look the same. Could there be something in the php keeping it from showing?

Website is sbbl.biz, the page with the non-working sidebar is the residential page under the dropdown.

Thanks for any help in advance.

Ian G.