I have a form created in life cycle. It was working fine. The latest versions of Acrobat Reader make the form difficult to use as the default security settings make the form inaccessible to some users. Our clients are worldwide and I cannot educate them all on changing the security setting. Is there anything I can do?

I created a new form, importing an existing PDFHowever, the master page is unavailable. It's grayed out under view and does not appear in heirarchy at allI have do this hundreds of times before - What might be wrong with this document?