Multiple loop… big problem

Hi,
i have some problem with the multiple loop!

My theme has 3 columns; in my left column there is this code for 5 categories:

<?php require('wp-blog-header.php'); ?>
<?php query_posts('showposts=1&cat=39'); global $more; $more = 1; while (have_posts()) : the_post(); ?>

<a href="<?php the_permalink() ?>" rel="bookmark" title="Permalink a <?php the_title(); ?>"><?php the_title(); ?></a>

<?php the_content_rss('', false, '', 20); ?>
<?php endwhile; ?>

in the central column there is this code:

<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>

<?php the_time('l, j M, Y') ?><?php comments_popup_link('0', '1', '%'); ?>

<h2><a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php the_title() ?></a></h2>
<h5>Categories: <?php the_category(', '); ?></h5>
<?php the_excerpt(''); ?>

The problem is in the second column, because it doesn’t visualize the articles, but only the same article of the first column.

Could you help me with this code???
Thanks a lot