Connection problem with xbox live to play online with "call of duty modern warfare 3".

Are you playing Call of Duty: Modern Warfare 2 or Call of Duty: Black Ops? With Call of Duty: Modern Warfare 2 an issue could be you are trying to play split screen online multiplayer over Xbox Live. Call of Duty: Modern Warfare 2 does not support split
screen online multiplayer. On the other hand if you are playing Call of Duty: Black Ops split screen online multiplayer is support however both accounts must be gold subscriptions (unless the 2nd user is signed in as a guest). If this problem proceeds please
power off your console and wait some time and try again. Good luck!

There is also a service alert on LIVE regarding matchmaking in certain games.

Matchmaking:

Users may experience difficulties with the following services:

Joining other Xbox LIVE members in online games with the following titles: Call of Duty: Modern Warfare 3, Call of Duty: Black Ops, Call of Duty: Modern Warfare 2, FIFA 12, and Battlefield 3

We are aware of the problem and are working to resolve the issue. We apologize for any inconvenience this may cause and thank you for your patience

Did you purchase Call of Duty Modern Warfare?

Call of Duty Warzone is free to download and play with an active Xbox Live subscription. The Call of Duty Modern Warfare campaign is not.

• Call of Duty (was ok, good start to the series)
• Call of Duty 2 (made online gaming what it is today
• Call of Duty 3 (fun at the time)
• Call of Duty 4: Modern Warfare (best of the series)
• Call of Duty: World at War (wasn't nowhere near as good as CoD4)
• Call of Duty: Modern Warfare 2 (huge disappointment)
• Call of Duty: Black Ops (rubbish, ok getting bored now)
• Call of Duty: Modern Warfare 3 (worst in the series)
• Call of Duty: Black Ops 2 (ok)
• Call of Duty: Modern Warfare 4 (please no)

Crysis 2

Call of Duty: World at War

Call of Duty: Modern Warfare 2

Call of Duty: Modern Warfare

Battlefield 3