fgonzalezgriffin on "No Next and Previous links showing"

I am using the Artisteer theme, and have been having problems with the Next and Previous links not showing up at the bottom of the page. I have tried all of the changes recommended that I could find in the forums with other people having the same problem and they have not worked. The last thing I tried was installing the WP-Pagenavi plugin. My Blog page is not set as the Main page, is that what the problem could be? My blog is http://www.yourhomehelpdesk.com/blog

Any help is much appreciated! Below is the code for the blog page.

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

<?php get_header(); ?>
<div class="art-content-layout">
<div class="art-content-layout-row">
<div class="art-layout-cell art-content">

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<div class="art-post2">
<div class="art-post2-tl"></div>
<div class="art-post2-tr"></div>
<div class="art-post2-bl"></div>
<div class="art-post2-br"></div>
<div class="art-post2-tc"></div>
<div class="art-post2-bc"></div>
<div class="art-post-cl"></div>
<div class="art-post2-cr"></div>
<div class="art-post2-cc"></div>
<div class="art-post2-body">
<div class="art-post-inner art-article">
<h2 class="art-postheader">
" rel="bookmark" title="<?php printf(__('Permanent Link to %s', 'kubrick'), the_title_attribute('echo=0')); ?>">
<?php the_title(); ?>

</h2>
<div class="art-postcontent">
<!-- article-content -->

<?php if (is_search()) the_excerpt(); else the_content(__('Read the rest of this entry »', 'kubrick')); ?>
<?php if (is_page() or is_single()) wp_link_pages(array('before' => '<p>Pages: ', 'after' => '</p>', 'next_or_number' => 'number')); ?>

<!-- /article-content -->
</div>
<div class="cleared"></div>

</div>

<div class="cleared"></div>
</div>
</div>

<?php comments_template(); ?>
<?php endwhile; endif; ?>

</div>
<?php include (TEMPLATEPATH . '/sidebar1.php'); ?>
</div>
</div>
<div class="cleared"></div>

<?php get_footer(); ?>