Custom Taxonomies display not working?

I know this should be easy, maybe there is something I am overlooking. I have a Custom Post Type I created for called “events_post_type” and within that post type I defined a taxonomy as “events_categories”. Now I have added a category from the backend of WordPress to that taxonomy and am trying to modify the template for that ‘term’. For example purposes lets say I named the category “Category 1” with a slug of “category-1”.

After reading up on Template_Hierarchy it looks like I should be able to achieve this by naming my template file something like: taxonomy-events_categories-category-1.php.

However this is not working, any idea why or what I may be doing wrong?