setup Ultimate facebook to work with facebook page

Hi,
I need to setup your plugin Ultimate Facebook to work with facebook page. When I try to setup it on way that you describe in your manual, I can automaticly post to any private facebook, but I can not automaticly post to facebook page. I need that your plugin work with this facebook page:
https://www.facebook.com/SB-Periskop-129939877145542/
Can you please explain me step by step how to automaticly post to facebook page.
Best regards