Cant add home page to site diagram

[dhborchardt]

I cannot add a home page to my site diagram. I create a project, add a site diagram, open site diagram, no home page. I right click/add home page, but a home page does not appear.
I manually create a page and call it default.htm, drag it to site diagram, right click\properties,but the check box to select it as home page is gray.

Please help
Dale