Unable to change icons

Hi, I have read and I believe, followed the instructions to on the plugin page to change the icons, however my new icon is not showing up.

In the top of functions.php I've added: add_theme_support(“bpfb_toolbar_icons”);

I have created a child theme based on bp-default so in my child theme folder I have added a folder called "images" and in my styles.css i have added: #bpfb_addPhotos {
background: url('images/camera.png') left top no-repeat;