categoty param in get_posts

Hi,

I am having a problem with a simple piece of code and it’s beed troubling me because, as far as i can see, the code is “by the book”.

I am trying to list all posts for a category of a custom post type. When i use the get:posts function for the post type the results are ok, but when i add the category argument it returns an empty array. Has anyone has this issue?

The code is the following:

$args = array(
‘post_type’=>’zen_art_newsletter’,
‘post_status’=>’publish’,
‘orderby’=>’post_date’,
‘order’=>’DESC’,
‘suppress_filters’=>0,
‘category’=>530
);

$newsletterPosts = get_posts($args);

Regards and thanks in advance,

Luis Dias