wp_nav_menu does not pull the menu

Hi,

I’m puzzled by the Menu functionality.
I just setup a new WP 3.1.3

I made my own template, not really from scratch, but took the bases from Basic theme (free from Elegant themes) afaik.

I made a lot of changes and adapted it to my needs.
Everything is ok, except I have an horizontal menu that does not works.
It shows only ONE item (the sample PAGE) and nothing else.

All I did in menu admin is reflected by a vertical menus in sidebar only (widget).
Maybe I did not understood : the menu manager is for sidebar only ??

How can I put the same stuff in an another menu ?
reading Codex I did the following
in my function.php added the references to a ‘menuh’ (the footer one is not done for the moment)

<?php
function register_my_menus() {
  register_nav_menus(
    array( 'Haut-menu' => __( 'Menu Haut' ), 'foot-menu' => __( 'Footer Menu' ))
  );
}
?>

and

function mytheme_wp_head() { ?>
<?php }
add_action('wp_head', 'mytheme_wp_head');
add_action('admin_menu', 'mytheme_add_admin');
add_action( 'init', 'register_my_menus' );
?>

In Menu management I get it and can choose it to be setup.
In my header.php I added what I think is the call to this menu
<?php wp_nav_menu( array( 'theme_location' => 'haut-menu' ) );?>

What’s wrong ?

Thank you