Wordpress admin menu not showing

[admin]

I'm building my first Worpess plugin. But 'hammu dating' is not showing up in the 'settings' panel in the wp-admin. The plugin is activated in the 'plugin' panel. I followed the instructions from <a href="http://codex.wordpress.org/Administration_Menus" rel="nofollow">here</a>.

add_action( 'admin_menu', 'hammenu' );

function hammenu() {
    add_options_page( 'Hammu Dating opties', 'Hammu Dating Opties', 'manage-options', 'hd_menu_1', 'hammu_options' );
}

function hammu_options() {
    if ( !current_user_can( 'manage_options' ) )  {
        wp_die( __( 'No rights' ) );
    }
    echo '<div class="wrap">';
    echo '<p>Nothing interesting here, yet</p>';
    echo '</div>';
}

Note: this is just a part of the plugin code