single page comment issue.

I was using the comment_popup_links but it won’t show comments on a single page…so I switched to this..

<?php if ( comments_open() ) : ?>
This post currently has
<?php comments_number(‘no comments’,’one comment’,’% comments’); ?>. “>Leave a Comment.
<?php endif; ?>

But it is still not showing comments on a single page. Can someone tell me what I’m doing wrong?