Pagenavi pentru subcategorii

Salut.
Nu stiu de ce, dar nu-mi merge paginatia pentru subcategorii. Pentru categorii merge de minune, dar nu si pentru subcategorii. Oare am gresit ceva in cod?

in fisierul archive.php am urmatorul cod:

Cod PHP:

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<?php get_header(); ?>
        <div id="contents">
            <section id="main">
                    <div class="clear"></div>
                <div id="leftcontainer">
                <div class="articol_scurt">
                    <div class="titlu_cat">
        <?php if (have_posts()) : ?>
       <?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
       <?php /* If this is a category archive */ if (is_category()) { ?>
        <h2 class="pagetitle">Navigati in categoria "<?php single_cat_title(); ?>"</h2>
       <?php /* If this is a tag archive */ } elseif( is_tag() ) { ?>
        <h2 class="pagetitle">Navigati in articolele cu tagul "<?php single_tag_title(); ?>"</h2>
       <?php /* If this is a daily archive */ } elseif (is_day()) { ?>
        <h2 class="pagetitle">Navigati in arhiva lunii"<?php the_time('F jS, Y'); ?>"</h2>
       <?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
        <h2 class="pagetitle">Navigati in arhiva lunii<?php the_time('F, Y'); ?>"</h2>
       <?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
        <h2 class="pagetitle">Navigati in arhiva anului<?php the_time('Y'); ?>"</h2>
      <?php /* If this is an author archive */ } elseif (is_author()) { ?>
        <h2 class="pagetitle">Author Archive</h2>
       <?php /* If this is a paged archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
        <h2 class="pagetitle">Blog Archives</h2>
       <?php } ?>
                    </div>
                    <div class="clear"></div>
                    <section class="articol_scurtt">
                        <br/>
        <?php while (have_posts()) : the_post(); ?>
        <article class="articol">
                            <header>
                                <?php 
                                //This must be in one loop
                                if(has_post_thumbnail()) {
                                    the_post_thumbnail(array(60,60), array('class' => 'alignleft'));
                                } else {
                                    echo '<img src="'.get_bloginfo("template_url").'/images/preview-little.png" alt="A" />';
                                }
                                ?>
                                <h1><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h1>
                                <p class="articolinfo"><time><?php the_time('F jS Y') ?></time> | <?php comments_popup_link('Nici un comentariu', '1 comentariu ', '% comentarii'); ?></p>
                            </header>
                        </article>
        <?php endwhile; ?>
        <div class="navigation">
            <?php if(function_exists('wp_pagenavi')) { wp_pagenavi(); } else { ?>
            <div class="alignleft"><?php next_posts_link('&laquo; Older Entries') ?></div>
            <div class="alignright"><?php previous_posts_link('Newer Entries &raquo;') ?></div>
            <?php } ?>
        </div>
    <?php else :
        if ( is_category() ) { // If this is a category archive
            printf("<h2 class='pagetitle'>Nu am gasit niciun articol.</h2>", single_cat_title('',false));
        } else if ( is_date() ) { // If this is a date archive
            echo("<h2 class='pagetitle'>Nu am gasit niciun articol.</h2>");
        } else if ( is_author() ) { // If this is a category archive
            $userdata = get_userdatabylogin(get_query_var('author_name'));
            printf("<h2 class='pagetitle'>Nu am gasit niciun articol.</h2>", $userdata->display_name);
        } else {
            echo("<h2 class='pagetitle'>Nu am gasit niciun articol.</h2>");
        }
    endif;
?>
                    <div class="clear"></div>
                </div>
                    <div class="clear"></div>
            </section>
<?php get_sidebar(); ?>    
<?php get_footer(); ?>

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