Comment form is missing on the listings

We had to much problem with the directory plugin and our last theme so we have changed.
But problems with directory plugin happen with the new theme as well.

There is no comment form for our members/readers to leave a review of the book.

Link to one of the listings: http://queermagazineonline.com/listing/exposed-by-skylar-m-cates/

What can be wrong?

Anders