Fails to load a map in cod mw2 multiplayer

Hello everyone,

I have a problem with cod mw2 multiplayer. it goes like this:
- I start up mw2.
-Then this message comes: It appears that mw2 did not quit properly last time it ran. Do you want to run the game in save mode? This is recommended for most people. It will change your system settings but not your controls.
-Then I have to choose between Yes, No or Cancle. It doesn't matter if I choose Yes or No he just ran the game.
-Then I'm searching for a game and find one. I joined it and then his is loading a map (doesn't matter which map).
-When he is at the end of loading a map he just quit the game and pretend if I never ran mw2.

And That's what happend over and over again. Can anybody PLEASE help we out because I love this game and now I can't play it.

Thanks already.