After installing the new DLC can not see any server in the list I tried it a hundred times with a refresh and restarting the game and still nothing what is the problem please help regards :?

have you upgraded your game version?

The Game SHould Automatically Update to r23...Make Sure u have placed the DLC files correctly....

The .iwd Files in main folder should go to your Game 's main folder ...Example 'C:/ProgramFiles/MW3/main'

and put the dlc folder in your Game 's Zone\Language Directory ...

Example 'C:/ProgramFiles/MW3/zone/English[or any other language]

Delete caches.xml and restart.

tnx for help now work