Can't turn on certain custom fields for search in the form preview....
I'm trying to add certain custom fields to my refine/search. I've added these fields to the form layout and they show up there - so users have been able to enter data in the fields. But it won't let me check the check box labeled "Advanced Search" to add them to the advanced search. Blah! What am I doing wrong.
They are text fields that are not required. But even if I make them required, it still doesn't let me check the box for advanced search.
I'm using classipress version 3.1.5