Pagination Proclaimation

I Always wanted to say that!
all jokes aside I have a issue that has been bugging me for a week!
I have a custom index file that displays the top 5 recent blogpost, and when the previous post button has been clicked it should pull in the last 5 post. BUUUTTTTT its not… ??

<?php
//The Query
query_posts('cat=1&showpost=-1&posts_per_page=5');
while (have_posts()) : the_post(); ?>
          <div class="post">
            <div class="content">
            <div class="holder">
            <div class="leftimg">
                <div class="month"><?php the_time('M') ?></div><!--month-->
                <div class="day"><?php the_time('d') ?></div><!--day-->
            </div><!--leftimg-->
            <div class="demo-show2 demo-show">
			<h1><?php the_title(); ?></h1>
			<p id="audioplayer_<?php the_id() ?>">Audio player replaces this text!</p>
			 <script type="text/javascript">
       AudioPlayer.embed("audioplayer_<?php the_id() ?>", {
	        soundFile: "<?php $key="link"; echo get_post_meta($post->ID , $key, true); ?>",
            titles: "<?php $key="title"; echo get_post_meta($post->ID , $key, true); ?>",
            artists: "<?php $key="artist"; echo get_post_meta($post->ID , $key, true); ?>",
            autostart: "no"
            });
       </script>
			<h3></h3>

			<div><?php the_content(); ?></div>
			<a href="<?php the_permalink(); ?>" id="comment">Leave a Comment</a>
            </div><!--rightc-->
            </div><!--holder-->
            </div><!--content-->
          </div><!--post-->

<?php endwhile;
?>
<br/><br/>
<p id="previous"><?php posts_nav_link('','','&laquo; Previous Entries') ?></p>
<?php
wp_reset_query();
?>

https://podcast2.abi.org/