Problem showing Related Posts

Hi,
I am new in this stuff about wordpress, but i found it actually very interesting the way of working with it, so i tried to create a web page with it.
I got some troubles when i try to write an entrie in the theme im using, wich actually is the Futurosity Eos. When i want to see it in my page on the footer of it, where it should say “Related Posts” I see an error

Warning: debug_backtrace() has been disabled for security reasons in /usr/export/www/vhosts/funnetwork/hosting/archi222/fi/wp-includes/wp-db.php on line 960

Warning: array_reverse() [function.array-reverse]: The argument should be an array in /usr/export/www/vhosts/funnetwork/hosting/archi222/fi/wp-includes/wp-db.php on line 963

I just want to delete that part, i mean i dont wanna see the titel Related Posts and what its include with that, but i dont know where i have to delete..and what..
Maybe someone could help me with it.

I think it is in this page, page.php

<?php get_header() ?>

	<div id="container">
		<div id="content">

<?php the_post() ?>
<h3>Page</h3>
			<div id="post-<?php the_ID(); ?>" class="<?php sandbox_post_class() ?>">
				<h2 class="entry-title"><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" rel="bookmark"><?php the_title(); ?></a></h2>
				<div class="excerpt"><p>This is a page. Whoa.</p></div>

				<div class="entry-content">
<?php the_content() ?>

<?php wp_link_pages("\t\t\t\t\t<div class='page-link'>".__('Pages: ', 'sandbox'), "</div>\n", 'number'); ?>

<?php edit_post_link(__('Edit', 'sandbox'),'<span class="edit-link">','</span>') ?>

				</div>
			</div><!-- .post -->

<?php if ( get_post_custom_values('comments') ) comments_template() // Add a key+value of "comments" to enable comments on this page ?>

		</div><!-- #content -->
	</div><!-- #container -->

<?php get_sidebar() ?>
<?php get_footer() ?>