Font Awesome

Hi,
I have tried installing fonts/icons (via the Icon Font Manager with a downloaded zip file) and only some of them install. Other fonts/icons just show up as a square box. In particular, I’m trying to install the “cab” and the “pin” or “pushpin” from Font Awesome. After reading some posts, I installed the code shown below into my child functions.php but it didn’t didn’t help (I have not upgraded to the latest version yet – had issues when I updated to the latest WordPress, so for now, I don’t want to update the theme, either). Can you tell me if I need to do something else in order to get these other fonts/icons, and does it matter what set I am downloading (there seem to be different sets designed by different people)?

add_action( ‘wp_enqueue_scripts’, ‘enqueue_font_awesome’ );
function enqueue_font_awesome() {

wp_enqueue_style( ‘font-awesome’, ‘//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css’ );

}