Album Category template not working

[cpyu99]

I got error message in /var/log/httpd/error.log

Undefined tage: Categories

Any idea ?

What i want to do is to list out the all Album categories.  Anyone have idea .. Thank you for your help in advanced.

[cpyu99]

The template I am talking about is

{section name=album loop=$categories}

{$categories[album].category->name}
{if !empty($categories[album].category->comment)}{$categories[album].category->comment}{/if}
{$categories[album].albums_content}

{/section}