ckeditor joomla: no 'media embed' icon in frontend

Hi,

just installed CKEditor component for Joomla (great by the way!).

I've customized the basic layout and added the 'media embed' icon but the icon doesn't show up in the frontend.
It's the same if I use the full or advanced layout as the frontend toolbar.
It works in the backend though.

Any help?

Thanks.