I'm using the theme "Distinction" by James Laws with the plugin "WP-Members by Chad Butler.
The website (http://www.johnmorrisonfamily.com) uses only pages, no posts. None of the pages accept comments, but one should. I looked through these support posts and found instructions to add <?php comments_template(); ?> to page.php in order enable comments. I have done this, but it doesn't seem to have made any difference.
I have also edited the page that needs to be comment enabled by checking the box labeled "Comments". I also tried the box labeled "Discussion". I even tried the box "Author". So all three are now ticked, but still no ability to make comments on the page.
The website is normally only accessible by members, but since it really isn't operational yet, I've taken off the restrictions in case someone can help, but needs to take a look first.
In spite of my lack of experience, I've been able to solve all the dilemmas until this one.