next page/posts problem

in my wp i have “WP Page Numbers” plugin…

i’ve paste the code from plugin faq… and its not working… the same is when i had this:

<p class="bb-t10 bb-fa"><?php next_posts_link('&laquo; Older Entries') ?></p>
<p class="bb-t10 bb-fc next"><?php previous_posts_link('Newer Entries &raquo;') ?></p>

so its not the plugin but something in my template… but i don’t know what…

this template show me posts from “www” category… in my wp preferences i have: 4 posts per pages… in “www” are 7 posts…

when i click on second page, the site is changed, but the posts are the same on site…

could someone help me with this?

<?php query_posts('category_name=www'); ?>
            <?php if (have_posts()) : ?>
                <?php while (have_posts()) : the_post(); ?>

                    <div class="bb-100" id="post-<?php the_ID(); ?>">

                        <h4><?php the_title(); ?></h4>                

                        <!--  | <?php comments_popup_link('Brak komentarzy', '1 Komentarz', '% Komentarze(y)'); ?> <br /> -->
                        <?php the_content('Czytaj dalej &raquo;'); ?>
                    </div>

                <?php endwhile; ?>

                <div class="bb-t30 nav-entry-pages">

                    <div class="bb-t10 bb-fa"><?php if(function_exists('wp_page_numbers')) : wp_page_numbers(); endif; ?></div>

                </div>

                <?php else : ?>

                    <h1>error</h1>

                <?php endif; ?>

</div>