Custom Post Permalinks

I only speak very little English.

I have just registered new custom post type (blog), connected custom taxonomy (mycat) with it. I try to force to display new custom post type on custom permalinks.

add_action('init', 'post_type_theme');
function post_type_theme()
{
$labels = array(
	'name' => 'Блог',
	'singular_name' => 'Блог',
	'add_new' => 'Добавить запись',
	'add_new_item' => 'Добавить новую запись',
	'edit_item' => 'Редактировать запись',
	'new_item' => 'Новая запись',
	'view_item' => 'Смотреть запись',
	'search_items' => 'Поиск по блогу',
	'not_found' =>  'Записей не найдено',
	'not_found_in_trash' => 'Записей в корзине не найдено',
	'parent_item_colon' => ''
	);
	$args = array(
	'labels' => $labels,
	'public' => true,
	'publicly_queryable' => true,
	'show_ui' => true,
	'query_var' => true,
	'rewrite' => array('slug'=>'blog', 'with_front' => false),
	'capability_type' => 'post',
	'hierarchical' => false,
	'menu_position' => 5,
	'supports' => array('title','editor','author','thumbnail','excerpt','comments','custom-fields','trackbacks'),

	);

	register_post_type('blog', $args);
	//flush_rewrite_rules();

	$taxlabrl = array(
	'name' => 'Тэги',
	'singular_name' => 'Тэг',
	'search_items' => 'Поиск тэгов',
	'all_items' => 'Все тэги',
	'add_new_item' => 'Добавить новый тэг',
	'new_item_name' => 'Имя нового тэга',
	'edit_item'=> 'Редактировать тэг',
	'add_or_remove_items' => 'Добавить или удалить тэг',
	);

	$taxargs = array(
	'labels' => $taxlabrl,
	'public' => true,
	'show_ui' => true,
	'hierarchical' => true,
	'show_tagcloud' => true,
	'rewrite' => array('slug' => 'mycat', 'with_front' => false),
	'query_var' => true
	);

	register_taxonomy('mycat', 'blog', $taxargs);

}

URL records look like – site/blog / % postname %
It is necessary that they looked like – site/blog / % mycat % / % postname %. php
How it to make?

Permalinks links can be changed by means of plugin Custom Post Permalinks.

/%post_type%/%mycat%/%blog%.php
or
/blog/%mycat%/%blog%.php

But such references return 404 (Not Found).