Connecting to Ultimate Team is not possible at the moment.

My friend and I log in on the same PC. He can log in but I can't. The same result occurs when I switch to another PC. Even when I change to another state, it still doesn't work.I'm pretty sure there's nothing wrong with my Internet,I can do all activities except UT, including online friendly matches. I can connect to the EA server, but only UT can't connect.I also tried to log in through the Web APP, but the result was the same - I still couldn't log in. Please solve it as soon as possible.