Pagination for custom query w/ 2 CPTs

I have been racking my brain and google to try and solve this issue I seem to be having for 2 days. I have never posted here, so I figured I would give it a try.

Basically, I have a wp_query I built that includes posts from 2 different custom post types. Right now my page will show the most recent 6 posts, pulling from both post types. But I can’t seem to get the pagination working, to continue with the links at the bottom to pull in the next series of 6 posts. I am assuming it is an issue with pulling in 2 custom post types, as I have another page that this works fine on.

<?php
                  $temp = $wp_query;
                  $wp_query = null;
                  $wp_query = new WP_Query(); 

                  $wp_query->query( array(
                    'post_type' => array( 'share', 'article' ),
                    'post_per_page' => '6',
                    'paged' => $paged,
                ) );

                while ($wp_query->have_posts()) : $wp_query->the_post(); ?>
                <div <?php post_class('feed-item span4'); ?> />
                  <div class='content'>
                    <?php getImage('1'); ?>
                    <span class="label"><?php foreach((get_the_category()) as $category) {
                      echo $category->cat_name . ' ';
                    } ?>
                    </span>

                    <?php single_cat_title(); ?>
                    <a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><h5><?php the_title(); ?></h5></a>
                    <?php $excerpt = get_the_excerpt(); echo string_limit_words($excerpt,25); echo '...' ?>
                  </div>
                </div>

              <?php endwhile; ?>

              </div> <!-- .row -->
            </div> <!-- Blog/Share Archive Feed -->    

            <?php include ('sidebar-home.php'); ?>

        <div class="span12 showmemore navigation">
          <?php previous_posts_link('&laquo; Previous Entries', '1000') ?>
          <?php next_posts_link('Next Entries &laquo;', '1000') ?>
        </div>

        <?php
          $wp_query = null;
          $wp_query = $temp;  // Reset
        ?>