wp_nav_menu() not customizing output.

Hi. I’m trying to put a fairly standard navigation menu in the header part of my site. I’ve put the following code in the functions.php file of the theme…

add_theme_support("nav-menus");
function custom_navigation_menus() {
    $locations = array(
        'header-menu' => __( 'Main Navigation', 'text_domain' ),
    );
    register_nav_menus( $locations );
}
add_action("init", "custom_navigation_menus");

And I put this code in my header.php file…

<?php wp_nav_menu(
    array(
        "theme-location"	=> "header-menu",
        "container" 		=> "div",
        "container_class" 	=> "standard-font",
        "container_id" 		=> "header-menu",
        "items_wrap" 		=> "<ul>%3$s</ul>",
        "after" 			=> " | "
    )
); ?>

The menu is showing up just fine but without the customized container_class, container_id, etc. It’s spitting out the standard mark-up. Before anyone mentions it, I know I could simply apply CSS to the standard mark-up but I’d like to know what I’m doing wrong here for my own enlightenment.