error pagination custom taxonomy

Good evening.

I have a problem with result pagination custom taxonomy. This is the code I use:

<?php get_header(); ?>
  <div id="page">
  <h1><?php $term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) ); echo $term->name; ?></h1>
<?php
  $type = 'portfolio';
  $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
  $args=array(
    'post_type' => $type,
    'archive-press'=>$term->slug,
    'post_status' => 'publish',
    'paged' => $paged,
    'posts_per_page' => 2,
    'caller_get_posts'=> 1
  );
  $temp = $wp_query;
  $wp_query = null;
  $wp_query = new WP_Query();
  $wp_query->query($args);
?>
<?php if($wp_query->have_posts()) : ?>
<div id="page_content">
  <ul>
    <?php while($wp_query->have_posts()) : $wp_query->the_post(); ?>
<li>
    <h2><?php the_title(); ?></h2>
    </li>
<?php endwhile; ?>
</ul>
</div>
<?php else : ?>

<p><?php _e('Apologies, but no results were found for the requested archive.', 'mytemplate'); ?></p>

<?php endif; ?>

<?php if (function_exists("emm_paginate")) {emm_paginate();}
$wp_query = null; $wp_query = $temp; ?>

  </div>
<?php get_footer(); ?>

The results are displayed correctly, even the pagination. When I click on the second or third page tells me page not found!

Can you help?

Sorry for my English but not speak it very well

Thanks