Single post navigation Previous post link shows up but Next post link doesn’t

Ok this issue was very hard to get fixed.
I finally found the solution:

• Above <?php if (have_posts()) : ?>:

insert:

<?php 
$max_entries_per_page = 0;
$current_page = (get_query_var('paged')) ? get_query_var('paged') : 0;
        query_posts("category_name=mobiliario&showposts=1&paged=" . $current_page)
?>

• Bellow <?php endwhile; ?>:

insert:

<div class="pagination">
   <div class="pagnext"><?php next_posts_link('—›', $max_entries_per_page) ?></div>
   <div class="pagprev"><?php previous_posts_link('‹—', $max_entries_per_page) ?></div>
</div>

I don’t know if this is a universal solution. For this structure I presented above it is.

Best regards,
H.