cant see font-awesome symbols in the frontend.

Hi,

i register the font awesome css in the functions.php of the enfold-theme

function fontawesome_css() {
wp_enqueue_style( ‘Font Awesome’, ‘//maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css’, array(), ‘1.0.0’, true );
}
add_action( ‘wp_enqueue_scripts’, ‘fontawesome_css’ );

But when i use the font awesome icons, they are not shown in the frontend. Please can you help me?