BuddyPress.org

There are any problem to add some function to my theme function.php in a wordpress multisite ? The function i’m trying to add it works perfectly in the test wordpress but in the multisite wordpress it doesn’t work . So does anyone know what can i do ?.

The function i’m trying to add is this one

function email_test() {
        $site_url = "helloagain";
        $user_info = "admin";
        $to = "adminwordpressrattata@hotmail.com"; 
        $subject = "it'works: ";
        $message = "Hello";
        wp_mail( $to, $subject, $message);
}
add_action( 'profile_update', 'email_test', 10, 2);

I’m using a 4.1.4 wordpress version and 2.2.2.1 buddypress version