Achiv Fehler?

<?php get_header(); ?>
     <?php
       $i = 0;
       if (have_posts()) : while (have_posts()) : the_post();
    ?>
        <?php if ($i == 0): ?>
 
         <?php if (!in_category( array('5','53')) ){ ?> 








      <div class="sidebar_newshead_right">
 <div class="comment">
 <?php if (function_exists('get_recent_comments')) { ?>
<div class="info"><?php _e('Letzte Kommentare:'); ?></div> 
   <?php get_recent_comments(); ?>




    <?php } ?>
<?php } ?> 




     
    </div>
  </div>  <div class="first_post_wrapper"> 
 <div id="maincontent" align="center">
      <div class="navigation_top_start" align="left" >
  <?php
 if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('sidebar1') ) : ?>
  <!-- Keine Widgets! -->
<?php endif; ?>
 
        <script type="text/javascript">
                    //<![CDATA[
                    jQuery("#cat").selectbox();
                    
                    //]]>
                    </script>
 
</div>




  <div class="newshead" align="left">  
                   
    <div class="block">  
    <div class="info" style="margin-left:360px;"><?php the_category(', '); ?></div>
    <div class="title" style="margin-left:360px;"><?php the_title(); ?></div>
    <div class="newsline" style="margin-left:360px;"><?php the_author(); ?> - <?php the_time('d.m.Y G:i'); ?></div>
     <div class="rezi" style="margin-left:360px;"><?php the_excerpt(25); ?></div>
     <div class="first_post_metadata" style="margin-left:360px;">
     <a href="<?php the_permalink(); ?>">mehr</a>
      <?php //the_tags('Tags: ', ', ', '<br />'); ?>
      <?php //the_category(', ') ?> <!--| -->
                            <?php //comments_popup_link('No Comments »', '1 Comment »', '% Comments »'); ?>
   </div></div></div></div>
   
   
   </div>
<?php get_sidebar(); ?>




<div id="maincontent" align="center">
<div align="center"><?php wp_pagenavi(); ?> </div>
  <div class="content" align="left" >  
        <?php else: ?>  
         <?php if (!in_category( array('5','53')) ){ ?> 




            <?php include('post.php'); ?><?php } ?> 




        <?php endif; ?>




    <?php $i++; endwhile; ?>
</div></div> 








    <?php else : ?>




        <h2>Not Found</h2>




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