Custom post type permalink not finding single or archive templates

When I go to permalink of individual post under my custom post type (nira_blog), I get the 404 page. i have single-nira_blog.php and single.php uploaded.

Also, Im filtering smart archives reloaded to only show custom posts, but when i hit link to certain months, it defaults to archive.php instead of archive-nira_blog.php, which is upoaded.

here is the function in functions.php

add_action('init', 'create_post_type');
function create_post_type() {

  $nbargs = array(
        'label' => 'Nira Blog',
		'has_archive' => true,
		'taxonomies' => array('category'),
		'show_ui' => true,
		'public' => true,
		'publicly_queryable' => true,
		'query_var' => true,
		'menu_position' => 5,
		'rewrite' => array('slug' => 'nira-blog', 'with_front' => false),
		'supports' => array('title','editor','author','thumbnail','excerpt','comments')

  );
  register_post_type('nira_blog', $nbargs);
}

single templates are just the normal templates. here is the main loop with the permalink that goes to 404 page

[Code moderated as per the Forum Rules. Please use the pastebin]

`
Please help!
Thank you