get_adjacent_post fails when using custom post types in The Loop

Hi,

I’m trying to use get_adjacent_post to work with the loop, but it seems to fail when using custom post types. I’m using $query->set to include my CPTs in the loop. Found the method on Justin Tadlock’s site: https://justintadlock.com/archives/2010/02/02/showing-custom-post-types-on-your-home-blog-page .

Here’s my loop code:

<?php
if(have_posts()) : while(have_posts()) : the_post();
 $adjacent_post_next = get_adjacent_post(false,'',true) ;
 $adjacent_post_previous = get_adjacent_post(false,'',false) ;
 $post_next = $adjacent_post_next->ID;
 $post_previous = $adjacent_post_previous->ID;
 echo "Previous = ".$post_previous." Next = ".$post_next."<br />";
endwhile;
endif;
?>