single_cat_title not displaying anything

Hi there,

All I’m trying to do is grab the category’s title in single.php, but I’m not having any luck I’m afraid.

The whole template for single.php is below, single_cat_title is at about line 6. What am I doing wrong? Thanks in advance.

<?php get_header(); ?>

	<div id="content">

	<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<h1><?php single_cat_title(); ?> <span class="inhead">- view all <?php the_category(', ') ?> items</span></h1>
	<h2><?php the_title(); ?></h2>
				<?php the_content('<p class="serif">Read the rest of this entry &raquo;</p>'); ?>
	<?php endwhile; else: ?>

	<?php endif; ?>	

	</div>

<?php get_footer(); ?>