I have used default woocommerce templates for shop, cart and single page. I have not removed any hooks either but also I am not getting any message. Any Idea?

add_action( 'woocommerce_before_single_product',   'Cusotm_wc_print_notices', 10 );
function Cusotm_wc_print_notices()
{
   echo 'Hook is working fine';
}

I am getting this message 'Hook is working fine' but not wc_print_notices();.