I'm having a similiar problem with comments field box not appearing.
I host the following website http://www.anglicanrosary.net/ using the dreamplace WP theme. I really like it and don't want to have to go to change to another theme. However, I don't seem to be able to get a comment field to appear on any page or post.
I tried scribblerguy's suggestion but this seems to make no difference. All the pages have allow comments and pings checked and under general settings I have anyone can register checked and unsers must be regisered and logged in to comment unchecked.
If anyone could help I'd much appreciate it.
PS at the top of my posts there is a a link to make comments, after which a comment field appears; see http://www.anglicanrosary.net/
However on pages like http://www.anglicanrosary.net/workshops/feedback-what-people-are-saying/ where I want a comment field, option for leaving a comment without making a post, it seems I cannot make a comment field appear even though on the page set up I've checked allow comments and pings.