Viewing Custom Post Types

I used the following code before the register_post_type and it worked! It is there for those who have the same doubt.

 register_taxonomy( 'images', 
    array('images'), /* This is the name of your custom post type, I used "Images" */
    array('hierarchical' => true,     /* if this is true it acts like categories */             
        'labels' => array(
             /* OPTIONS */
        ),
        'show_ui' => true,
        'query_var' => true,
    )
);    

register_post_type( 'images',
    array(
        'labels' => array(
            'name' => __( 'Images' ),
            'singular_name' => __( 'images' ),
            'add_new' => __('New', 'Image'),
        ),
        'public' => true,
        'capability_type' => 'post',
        'rewrite' => array('slug' => 'images/test','with_front' => FALSE)
    )
);

For those who did not understand the solution:

The problem was with using a taxonomy reserved by WordPress, in the category case, using images worked normally.