Several query_posts wont work..

How do i get several query posts to work with my loop?
I want to exclude the category, and only show 3 posts, but its only the exclude category that works..

My code looks like this:

<?php query_posts( 'cat=-3', 'posts_per_page=3'); ?>
<?php $i = 0; while( have_posts() ) : the_post(); $i++; ?>

<div id="post" class="post-<?php echo $i; ?>">

<a href="<?php the_permalink(); ?>">
<div id="image" class="image-<?php echo $i; ?>">
<?php the_post_thumbnail(); ?>
</div>
</a>

<div id="excerpt" class="excerpt-<?php echo $i; ?>">

<a href="<?php the_permalink(); ?>">
<h2><?php the_title(); ?></h2>
</a>
<br/>
<?php the_excerpt(); ?>

</div>
</div>
<?php endwhile; ?>

Thanks for your help ??