CSS register style

Hi, Im having a problem to register and load a gallery css code fro my home page. Rest of the styles are loading fine, but this flexslider is ot registering. Any guidance appreciated.

<?php 

function theme_styles() {

	wp_enqueue_style ('normalize', get_template_directory_uri() . '/css/normalize.css');
	wp_enqueue_style ('grid', get_template_directory_uri() . '/css/grid.css');
	wp_enqueue_style ('main', get_template_directory_uri() . '/style.css');

    wp_register_style( 'flexslider', get_template_directory_uri() . '/css/flexslider.css' );
    if( is_page( 'home' ) ) {
        wp_enqueue_style( 'flexslider' );
    }
}
add_action( 'wp_enqueue_scripts', 'theme_styles' );

// Enable custom menus
add_theme_support( 'menus' );

?>

Many thanks