You already have!! You did it when you set the page properties (to be php). The correct page is http://www.barefootweddings.ca/contactus.php

Now, since the pge is php and not html anymore, simply change the URL in your menus. The Button for "Contact us" should point to http://www.barefootweddings.ca/contactus.php instrad of http://www.barefootweddings.ca/contactus.html

Also, connect with FTP or File Manager, and DELETE the file contactus.html from your site.

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