Query Not Working

Hey,

I went to http://codex.wordpress.org/Template_Tags/query_posts and I tried using this code in my template.

<?php
// retrieve one post with an ID of 5
query_posts('p=5');
?>

This code did not work. I changed the ID to the ID of the post I wanted to show, and it never showed on the front page. Then when I used the following code, I got a parse error.

<?php
// retrieve one post with an ID of 5
query_posts('p=5');

global $more;
// set $more to 0 in order to only get the first part of the post
$more = 0; 

// the Loop
while (have_posts()) : the_post();
  // the content of the post
  the_content('Read the full post »');
endwhile;
?>