please help me, when i try to play on multiplayer it says this error:

The call of duty black ops server is not available at this time. please try again later or visit www.callofduty.com black ops status for updates
i have like 2 week with this shitt i try restarting the wifi connection i try entering to the modem,searching tutorials and all, but nothings working
i cant play mw2,black ops,mw1..this happening only with call of duty games..i play online zombies very well.................. soo this is only with the multiplayer.. i read a post where somebody say: i have 1 month with this error..THATS a SHIIT soooooo pleasee help me to fix thisss