How do I create a page template to display a custom post type?

I am wanting to create a page template file to display posts from a custom content type. I was working with this code I found from this site, but it renders nothing. Does anyone know what the problem is?

<?php /* Template Name: Custom Post Type Archive */
get_header(); ?>

<?php
global $query_string;
query_posts($query_string . "post_type=YOUR-CUSTOM-POST-TYPE&post_status=publish&posts_per_page=10");
if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

<h2><a href="https://wordpress.stackexchange.com/questions/41054/<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h2>
<?php the_excerpt(); ?>

<?php endwhile;
endif; ?>
<div class="navigation">
    <div class="alignleft"><?php next_posts_link('Previous entries') ?></div>
    <div class="alignright"><?php previous_posts_link('Next entries') ?></div>
</div>
<?php wp_reset_query(); ?>

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

You don’t need to use a query, just create your tample and name single-YOURCUSTOMPOSTNAME.php, for more references take a look at:

• http://codex.wordpress.org/Post_Types#Template_Files