menu registration

anyone see whats wrong with this code?

<?php wp_nav_menu( array('menu' => 'support' )); ?>

or for that matter

<?php
if ( is_user_logged_in() ) {
wp_nav_menu( array('menu' => 'support' ) );
} else {
wp_nav_menu( array('menu' => 'support2' ) );
}
?>

I cant seem to get it to display the right menu either way... Ive tried both the following to register the menus

register_nav_menu( feature, Features );
register_nav_menu( support, Support );
register_nav_menu( support2, Support2 );

if ( function_exists( 'register_nav_menus' ) ) {
register_nav_menus(
array(
'feature' => 'Feature Menu',
'support' => 'Logged in Support Menu'
'support2' => 'Logged out Support Menu'
)
);
}

the last method actually returns a syntex error and breaks wordpress lol.. so I know that is wrong.