ambar.guy

use this

//$pages=wp_list_pages($args);
    $parents = get_post_ancestors( $post->ID );
	$id = ($parents) ? $parents[count($parents)-1]: $post->ID;
	$args = array(
    			'order' => $sort_order,
    			'post_parent' => $id,
    			'post_status' => 'publish',
    			'post_type' => 'page',
    	);
	$attachments = get_children( $args );
    				foreach($attachments as $attachment)
    	    { if(($attachment->post_title != $thispagetitle)): ?>    

    	    			<li><a href="<?php echo $attachment->guid;?>"><?php echo $attachment->post_title;?></a></li>
    	    		<?php 	endif;
    	    }
    			   print_r($pages);

under else when checking if($attachments)
in the file plugin_list_subpages.php