Jetpack Help?

Hello everyone.
I’ve just got the Jetpack plugin so that it automatically posts to my social media using the Publicize feature.
It seems to be working all fine and good for my Twitter
However, on Facebook I want it to automatically publish on one of my Facebook pages and not my actual profile. However, when I try this, it tells me I need to switch back to my profile.
How can I get it to post on a certain page?
Thanks