php - I can't get the previous posts link to show -

first of all, i've been on google, stackexchange , codex still can't solve problem. might simple; not sure. have following function lists custom posts. page has more 1 query 1 (this one) make use of pagination. it's on front page - set static.

here function:

function wight_listings() {     global $wp_query;     global $page;      $backup = $wp_query;     $wp_query = null;     $cur_page = $page; //get_query_var('page') ? get_query_var('page') : 1;      $args = array(             'post_type' => array('wight_listing'),             'posts_per_page' => 7,             'paged'=>$cur_page         );     $wp_query = new wp_query($args);     ?>     <?php if ( $wp_query->have_posts() ) : ?>     <?php while ( $wp_query->have_posts() ) : $wp_query->the_post(); ?>         .         .         .     <?php endwhile; ?>         <div id="nav-posts" style="margin-top: .5em;">             <div style="float:left;"><?php previous_posts_link('previous listings &laquo;'); ?></div>             <div style="float:right;"><?php next_posts_link('&raquo; next listings'); ?></div>             <div class="clear"></div>         </div> <?php  else: ?>     <p>oh no! there's nothing show. :(</p> <?php endif; ?> <?php     $wp_query = null;     $wp_query = $backup; } 

the 'next listings' links shows linking page 2 no matter page on , 'previous listings' link never show up.

what doing wrong?

wp: 3.5.2

i found solution. looked /wp-includes/link-template.php , found 2 functions responsible mysery. copied them theme , modified little , works fantastically.

function wight_get_previous_posts_page_link($cur_page) {     if ( $cur_page > 1 )     {         $nextpage = intval($cur_page) - 1;         if ( $nextpage < 1 )             $nextpage = 1;         return '<a href="' . get_pagenum_link($nextpage) . '">&laquo; previous listings</a>';     } }  function wight_get_next_posts_page_link($cur_page, $max_page) {     $paged = $cur_page;      if ( !$paged )         $paged = 1;     $nextpage = intval($paged) + 1;      if ( $max_page >= $nextpage )         return '<a href="' . get_pagenum_link($nextpage) . '">next listings &raquo;</a>';  } 

used in place of previous_posts_link , next_posts_link.

<?php echo wight_get_previous_posts_page_link($cur_page); ?> <?php echo wight_get_next_posts_page_link($cur_page, $query->max_num_pages); ?>