[support] Drupal 6: node-blog.tpl.php not used. Where is my error ?

Hi all.

I'm creating my new themes, and this is the first time to me for Drupal 6.x theme system.

In Drupal 5 for a blog's type node I created a file called node-blog.tpl.php. Which is the new name ? Because in my new drupal 6's theme node-blog.tpl.php is not used.

This is my template.php file:

<?php // $Id: template.php,v 1.1.2.7.2.4 2008/11/13 15:56:25 psynaptic Exp $

// Auto-rebuild the theme registry during theme development. if (theme_get_setting('clean_rebuild_registry')) { drupal_rebuild_theme_registry(); }

(very short for the moment).

And this is my node-blog.tpl.php file:

<?php echo "I'm your file"; ?>

Where is my error ?