Comments on Custom Pages

Look at your template to see if you’re calling the comments template like so:

<?php comments_template(''); ?>

and change it to:

<?php comments_template(); ?>

(Note the lack of quotes/parameter).

The function comments_template() is what we call an include tag, and belongs in your theme templates (that is, where you want to include/display comments).

You have to be using it (or some reasonable PHP facsimile) to be including the comments template in your posts and Pages. Let’s start with an easy q to help track this down: is your theme using a page.php template?

“Does this mean my theme has limited support for custom pages?“

No, it just means any customization has to be done in the templates as is, or what templates you need added to that theme.

Anyway, this is your problem (in index.php):

<?php comments_template( is_single() ); // Get wp-comments.php template ?>

comments_template() normally accepts only a file (i.e. a template) name as an argument; is_single() is what we call a conditional function or tag, and is used for testing what page (or query) type one is viewing. What it should look like is this:

<?php if(is_single()) { // if single post
comments_template(); // Get comments.php template
} ?>

To also display on Pages, use this:

<?php if(is_single() || is_page()) { // if post/Page
comments_template(); // Get comments.php template
} ?>

You can also try just:

<?php comments_template(); // Get comments.php template ?>

since comments_template() should only be included by WordPress on single posts and Pages anyway.