Two dynamic menus on same page in 3.6 !?

For some reason this doesn’t work any more:

<div id="nav-container">
	<ul>
	<?php wp_nav_menu(
		array(
			'menu' => 'Main Menu',
			'container' => '',
			'items_wrap' => '%3$s'
		)
	); ?>
	</ul>

	<ul id="main-nav-2">
	<?php wp_nav_menu(
		array(
			'menu' => 'Right Menu',
			'container' => '',
			'items_wrap' => '%3$s'
		)
									); ?>
	</ul>
</div>

This is from function file:

if (function_exists('register_nav_menus')) {
        register_nav_menus (
	        array(
			'main_nav' => 'Main Menu',
			'right_nav' => 'Right Menu'
		)
	);
}

I set two different menus in admin panel and selected which one I want to use where.
But only last menu is printed two times !?

Can someone help me please ?