Wordpress Multiple Loop

<?php
/*
Template Name: Portfolio
*/
?>

<?php get_header(); ?>
<script type="text/javascript" src="<?php bloginfo('template_url'); ?>/js/jquery-1.4.3.min.js"></script>
<script type="text/javascript" src="<?php bloginfo('template_url'); ?>/js/jquery.nivo.slider.pack.js"></script>
<script type="text/javascript">

jQuery(window).load(function() {
    jQuery('#slider').nivoSlider({
        effect:'fade', //Specify sets like: 'fold,fade,sliceDown'
    slices:15,
        animSpeed:500, //Slide transition speed
        pauseTime:5000,
        startSlide:0, //Set starting Slide (0 index)
        directionNav:true, //Next & Prev
        directionNavHide:true, //Only show on hover
        controlNav:true, //1,2,3...
        keyboardNav:true, //Use left & right arrows
        pauseOnHover:true, //Stop animation while hovering
        captionOpacity:0.8, //Universal caption opacity
    });
});
</script>

<body>
    <nav>
      <?php wp_nav_menu(array('menu' => 'Main Nav Menu')); ?>
      <a href="http://www.twitter.com/Kortschot" target="_blank" class="twitterbird-nav"></a>
    </nav>

    <p style="font-size: 16px; text-align:center; padding:10px 0 0 0;">Deze pagina is nog in ontwikkeling</p>

    <div id="main-content-werk">

        <div id="slider">
          <?php $my_query = new WP_Query('category_name=werk&posts_per_page=3');
           while ($my_query->have_posts()) : $my_query->the_post();
           $do_not_duplicate = $post->ID;?>
           <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><img src="<?php echo get_post_meta($post->ID, 'slider-image', true); ?>" alt="" title="<?php the_title(); ?>" /></a>
           <?php endwhile; ?>
         </div> <!-- END slider -->

         <br clear="all" />

         <?php wp_reset_query(); ?>

        <?php if (have_posts()) : while (have_posts()) : the_post();
        if( $post->ID == $do_not_duplicate ) continue; ?>
          <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a>

        <!-- Do stuff... -->

        <?php endwhile; endif; ?>

    </div> <!-- end main-content-werk -->

    <?php get_footer(); ?>