Child pages post_thumbnail

I have the following code, which is meant to pull in the child page’s of the page ID 14 featured image, and I can’t work out why it’s not working. It’s doing nothing at all…

<?php $ID = get_the_ID();
		$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
		query_posts("post_type=page&post_parent=$ID&order=ASC&orderby=menu_order&child_of=14&posts_per_page=1&paged=$paged"); while ( have_posts() ) : the_post(); ?>
				<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
				<?php if ( has_post_thumbnail() ) { the_post_thumbnail(); } ?>
				</a>
		<?php endwhile; ?>
		<?php wp_reset_query();?>

I also changed this code around to display

<?php query_posts("post_type=page&order=ASC&orderby=menu_order&child_of=14&posts_per_page=2"); while ( have_posts() ) : the_post(); ?>
				<a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>" >
				<?php if ( has_post_thumbnail() ) { the_post_thumbnail(); } ?>
				</a>
		<?php endwhile; ?>
		<?php wp_reset_query();?>

Which outputs the anchor tags but not the child pages of 14 – it just outputs all the pages.

Any help would be really appreciated.