I have installed the game to play some multiplayer but i have some problems with it, yesterday i have played the game with no problems and today when i tryed to play, every time when i double click on a server to join a game, the game crashes, i have played the singleplayer without any problems today and when i got to multiplayer again the same problem.

Anyone has any idea why ?

You could try using System Restore to go to an earlier state, before the problems happening.

Also if restoring your system with a previous restore point yields unsuccessful results (Big word o.o) It may be a result of not having up-to-date drivers (GPU most likely), with them releasing new updates between the time you've last played...

Hope one of these answers help you out!!! Best of luck

-Metroid

I solved the problem.

See you in combat then