A Loop issue

Hey everyone,

I’m trying to request posts from a category at the category.php using The Loop. For some unknown reason, I am only retrieving one post at the loop. Any suggestions? Here’s the code:

<div id="content" class="clearfix">

		<h1 class="archive-title"><?php single_cat_title( '', true ); ?></h1>

		<?php query_posts('post_type=post') ?>

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

		<div>
			<span>oi</span>
		</div>

		<?php endwhile; 

			  else : ?>

				<p>N?o há posts nesta categoria!</p>
		<?php endif; ?>

		</div><!-- #content -->
	</div><!-- #primary -->

<?php get_footer(); ?>