When i want to enter to a server , loading bar is fully loaded but never loads the server cuz its always setting up and nothing else . I waited for half hour , but server never loads. I tried on few other servers - same problem. What i need to do?

What are the specs of your computer?

Are you trying to load DLC? - Do you have the DLC?

Have you tried re-installing 4D1 or even the game? (I wouldn't suggest reinstalling the game as a first option)

I have everything. I have played first time on a server.

Try loading up a private match yourself and see what it does. Then try going into a server with the lowest ping regardless of the amount of players in it. Also where did you get your MW2 from?