Stop Custom Post Query?

I created a separate php file for a part of a template I wanted to display in the header, but the query brings up posts all down the page and I was wondering how I would stop that????

Here is my code:

<?php
/**
* Template for Events Header
*/
?>

<div class=”right”>
<h1>UPCOMING EVENTS</h1>
<?php
query_posts(array(
‘post_type’ => ‘events’,
‘showposts’ => 4
) );
?>
<?php while (have_posts()) : the_post(); ?>
<h2>“><?php the_title(); ?></h2>
<p><?php echo get_the_excerpt(); ?></p>
<?php endwhile; ?>
</div>

It was really simple and works beautifully, but I can’t stop it from bringing posts from teh custom post type and placing them were the main posts are supposed to be. Can anybody help me?