Slider change

Hi,

i have a theme with a slider (example).

Now there is the following code to create the slider:

<?php
$sticky = get_option('sticky_posts');
if ( ! empty($sticky)) {
rsort( $sticky );
$sticky = array_slice( $sticky, 0, 5 );
query_posts( array( 'post__in' => $sticky, 'caller_get_posts' => 1 ) ); ?>

Now all posts which are a sticky post will get in the slider. But i don’t want it to be sticky posts. I want it to be a category of my own choice. I made the following code

<?php
$sticky = get_option('default_category');
if ( ! empty($sticky)) {
rsort( $sticky );
$sticky = array_slice( $sticky, 0, 5 );
query_posts( array( 'post__in' => $sticky, 'caller_get_posts' => 1 ) ); ?>

But now all posts are posted (even when they dont have the default category). Does someone know how to fix it?

Thank you in advance.
Bas