more tag in Contango theme

In the Contango theme you can choose the post style between excerpt and content option. Having chosen the excerpt option and that works, but when entering a more tag to shorten the posting manually the read more text will not be displayed!? Can′t recognize where the more-tag is defined or involved?

Here is the index.php:

<?php get_header(); ?>
<?php get_template_part( ‘loop-meta’ ); ?>
<div class=”container_16 clearfix”>
<div class=”grid_11″>
<div id=”content”>
<?php if ( have_posts() ) : ?>
<?php while ( have_posts() ) : the_post(); ?>
<?php get_template_part( ‘content’, get_post_format()); ?>
<?php endwhile; ?>
<?php else : ?>
<?php get_template_part( ‘loop-error’ ); ?>
<?php endif; ?>
<?php contango_loop_nav(); ?>
</div> <!– end #content –>
</div> <!– end .grid_11 –>
<?php get_sidebar(); ?>
</div> <!– end .container_16 –>
<?php get_footer(); ?>