Plutonium

Hi,
I've this problem when I try to connect to Online services on BO2 zombies and multiplayer i'm stuck on the screen and says:

• The call of duty black ops 2 is not avaible at this time please try again or visit '...link'

The problem is only with BO2, with BO everything's fine, last week worked.

Ok, thank you

Hello everybody, i would like to get BO1 but if I get it without DLCs, in order to play on Plutonium i have to purchase them on Steam?