Exclude category from home page

Hi guys,
as you can see below I’ve excluded the 904 category from my home page (www.zerohradinord.net). Now I need to exclude also the 4188 category: what I’ve to do?
Thanks in advance.

MM

<?php if (have_posts()) : ?>

<?php

if (is_home()) {

$paged = (get_query_var(‘paged’)) ? get_query_var(‘paged’) : 1;

query_posts(‘cat=-904&paged=’ . $paged);

}

?>

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

<div class=”post” id=”post-<?php the_ID(); ?>”>