Problem when start to connect to Bnet ingame

“YOU HAVE NOT BEEN ONLINE IN THE LAST 30 DAYS. PLEASE START THE GAME WHILE ONLINE TO CHECK FOR ANY LOGIN AGREEMENTS”

When I try to login and after the login screen click to connect to the battlenet I receive this message and when click on OK, going back to the “press any key to start the game” screen. I’m online of course…
(At least Alt+F4 works.)