When I turn on Publicize, it shuts down the whole plugin

Jetpack is always giving me a hard time but now it’s just completely out of control.

1) I have to connect it to the wordpress.com account many times as it just disconnects for no reason. (whith the publicize module deactivated. See number 2). )

2) Publicize module just shuts the whole jetpack down. When I try to activate publicize (connect it only to FB, Twitter and Tumblr), a blank pop up window comes out that I can only close. I do so, I try to save changes and the next window I get it’s an Error page:

You do not have sufficient permissions to access this page.

Next thing I know is Jetpack has disconnected again to my wordpress.com account, and when I try to connect it again, a new error page comes up:

Invalid request, please go back and try again.
Error Code: invalid_client
Error Message: The required “client_id” parameter is missing.

If I want Jetpack sort of running now, I have to deactivate it, delete it, install it again, and don’t dare to touch it after I finally connect it to my wp.com account. And then live with the frequent problem number 1).
Please help? Thank you so much.