comment box not showing

it seems my themes not show me comment box

below is my current theme setting.php code

<?php
global $SMTheme;

get_header();

get_template_part(‘theloop’);

the_tags(“<div class=’tags’><span>”.$SMTheme->_( ‘tags’ ).”:  </span>”, “, “,”</div>”);

get_template_part(‘relatedposts’);

comments_template();

get_template_part(‘navigation’);

get_footer();
?>`
I also tried to add this link

<?php comments_template(); ?>

but doesn’t work need your expert help