Menufrage, k2, Subpage-tag?

<?php /* Creates a menu for pages beneath the level of the current page */
		if (is_page()) {
			$current_page = $post->ID;
			while($current_page) {
				$page_query = $wpdb->get_row("SELECT ID, post_title, post_parent FROM $wpdb->posts WHERE ID = '$current_page'");
				$current_page = $page_query->post_parent;
			}
			$parent_id = $page_query->ID;
			$parent_title = $page_query->post_title;


			$test_for_child = $wpdb->get_results("SELECT * FROM $wpdb->posts WHERE post_parent = '$parent_id'");


			if($test_for_child) { ?>


			<div class="sb_pagemenu"><h2><?php echo $parent_title; ?> Subpages</h2>
				<ul>
					<?php wp_list_pages('sort_column=menu_order&title_li=&child_of='. $parent_id); ?>
				[/list]
			</div>
	<?php } } ?>