Do you have to have the keyword field in the advanced search box for it to work?

Have a fresh install of both wordpress and DT 3.6 and followed video tut. on setting up custom advanced search.

My search results return the homepage instead of a listing gallery.

However, if I include the KEYWORD field (even without entering a keyword) with my custom fields in the advanced search box, the gallery displays.

Have I missed something or do you have to have the keyword field in the advanced search box for it to work?

(Setup is on my computer before I upload to a host)

Thanks