"Nächster Post" funktioniert nicht - query_posts problem

<?php get_header(); ?>
  <div class="home">
<?php get_sidebar(); ?>
  <div id="content">
<?php query_posts('showposts=1'); ?>
 <?php if (have_posts()) :?>
  <?php while (have_posts()) : the_post(); $do_not_duplicate = $post->ID; ?>
    <div class="entry-fresh"><img src="<?php bloginfo('template_directory'); ?>/images/fresh_badge.gif" alt="Fresh and Tasty!" class="fresh_badge" />
     <div class="entrytitle"><h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanenter Link zu <?php the_title(); ?>"><?php the_title(); ?></a></h2></div>
     <h3><?php the_time('j. F Y, H.i') ?></h3>
     <div class="entrybody">
      <?php the_content('<span class="readmore">Den ganzen Eintrag   lesen &raquo;</span>'); ?>
     </div>
 
     <div class="entrymeta">
      <div class="postinfo">
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/user_edit.png" alt="Eingetragen von" /><span class="postedby">Eingetragen von <?php the_author() ?></span>
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/comments.png" alt="Kommentare" /><span class="commentslink"><a href="<?php comments_link(); ?>" title="<?php the_title(); ?>"><?php comments_number('Kein Kommentar','1 Kommentar','% Kommentare'); ?></a></span>
       <?php edit_post_link('Bearbeiten', '</span><span class="editpost">', ' </span>'); ?>
<?php if (function_exists('UTW_ShowTagsForCurrentPost')) { /* If UTW is installed, do this */ ?>
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/tag.png" alt="Tags" /><span class="taggedas">Tagged with: <span id="tags-<?php the_ID(); ?>"><?php UTW_ShowTagsForCurrentPost("commalist", "", "5") ?></span></span>
<?php } else { /* If UTW is not installed, to this */ ?>
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/folder.png" alt="Abgelegt unter" /><span class="filedto">Abgelegt unter: <?php the_category(', '); ?></span>
<?php } ?>
      </div>
     </div>
    </div>
    <?php endwhile; endif; ?><?php rewind_posts(); ?>
 
    <?php query_posts('showposts=5'); ?>
    <?php if (have_posts()) : while (have_posts()) : the_post(); if( $post->ID == $do_not_duplicate ) continue; update_post_caches($posts); ?>
    <div class="entry">
     <div class="entrytitle"><h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanenter Link zu <?php the_title(); ?>"><?php the_title(); ?></a></h2></div>
     <h3><?php the_time('j. F Y, H.i') ?></h3>
     <div class="entrybody">
      <?php the_content('<span class="readmore">Den ganzen Eintrag   lesen &raquo;</span>'); ?>
     </div>
 
     <div class="entrymeta">
      <div class="postinfo">
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/user_edit.png" alt="Posted By" /><span class="postedby">Eingetragen von <?php the_author() ?></span>
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/comments.png" alt="Comments" /><span class="commentslink"><a href="<?php comments_link(); ?>" title="<?php the_title(); ?>"><?php comments_number('Kein Kommentar','1 Kommentar','% Kommentare'); ?></a></span>
       <?php edit_post_link('Bearbeiten', '</span><span class="editpost">', ' </span>'); ?>
<?php if (function_exists('UTW_ShowTagsForCurrentPost')) { /* If UTW is installed, do this */ ?>
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/tag.png" alt="Tags" /><span class="taggedas">Getaggt unter: <span id="tags-<?php the_ID(); ?>"><?php UTW_ShowTagsForCurrentPost("commalist", "", "5") ?></span></span>
<?php } else { /* If UTW is not installed, to this */ ?>
       <img src="<?php bloginfo('template_directory'); ?>/images/icons/gif/folder.png" alt="Filed To" /><span class="filedto">Abgelegt unter: <?php the_category(', '); ?></span>
<?php } ?>
      </div>
     </div>
    </div>
 <?php endwhile; ?>
  <div class="navigation">
   <div class="alignleft"><?php next_posts_link('&laquo; Vorherige Posts') ?></div>
   <div class="alignright"><?php previous_posts_link('Neuere Posts &raquo;') ?></div>
  </div>
 <?php else : ?>
  <h2>Nicht gefunden</h2>
  <div class="errormessage">Du hast etwas gesucht, das hier nicht vorhanden ist. Falls Du glaubst, dass ein Fehler vorliegen muss, bitte <a href="mailto:<?php echo antispambot(get_bloginfo('admin_email')); ?>" title="E-mail the <?php bloginfo('name'); ?> webmaster">hier klicken</a> um den  <?php bloginfo('name') ?> Webmaster zu kontaktieren. </div>
 <?php endif; ?>
 </div>
<?php get_footer(); ?>