Custom Taxonomy archive template with CustomPress


I have been trying to add a custom archive template to a Custom taxonomy integrated with a custom Post Type both created with CustomPress.

I am running Wordpress and buddypress site here

I created the CPT called Partners, it has two template file, archive-partners.php and single-partners.php All good so far.

Now I have created a custom taxonomy called partners_categories. I have picked the slug partner/category to trick the rewrite url rules so I get the following

Now my problem is that it looks like the default archive template and I would like to look like the archive-partners.php template. How can I do this? I have try taxonomy-partners.php or taxonomy-partners_categories but allways see the default archive.php template!?...

Thanks in advance for your help,