Problem with page 2 in wordpress category

Hello

I have a small problem on this page: http://www.celjani.com/

First page shows posts from a certain category and excludes posts from all other categories. This is the code used:

<?php if (is_home()) query_posts( array(
'showposts'=>5,
'cat' => '-5,-4,-8,-9')); ?>															
					<?php if (have_posts()) : ?>															
					<?php while (have_posts()) : the_post(); ?>

Code (markup):

On the bottom of the page, there is a link with text: "« Starejše novice"

Which would have to open page 2 of that category, but it does not. It opens page 2 but there are still the same posts on the site.

This is the code I use for the link to next page:

<?php next_posts_link('&laquo; Starejše novice') ?>

Code (markup):

Do you have any idea how would I fix that, so when clicking on the link I would actually get a page 2 of that category?

Thank you!