<?php posts_nav_link(); ?> tag not working

I run ohgizmo.com. After upgrading from 2.0.1 to 2.2.1, the navigation tags we used didn’t work anymore. I believe they’re deprecated. But now, the new ones don’t work either. This is the code I had before:

<div class=”navigation”><div class=”corner1″> <div class=”corner2″>
<div class=”padit”><?php next_posts_link(‘« Previous’) ?><?php previous_posts_link(‘ | Next »’) ?></div>
 </div></div></div>

After the upgrade, this wasn’t working anymore. So I replaced it with the following.

<div class=”navigation”><div class=”corner1″> <div class=”corner2″>
<div class=”padit”><?php posts_nav_link(”,”,’« Previous Entries’) ?><?php posts_nav_link(”,’Next Entries »’,”) ?></div>
 </div></div></div>

However, this isn’t working either. Where the “Next” and “Previous” links should be, all there is is an empty little box. I even tried the following:

<div class=”navigation”><div class=”corner1″> <div class=”corner2″>
<div class=”padit”><?php posts_nav_link(‘|’,’Next’,’Previous’); ?></div>
 </div></div></div>

And no luck.

I need help, badly.