After several uninstalls and re-installations i also uninstalled the Ubisoft Game Launcher (UGL). After that i installed the game (which probably installs the latest version of UGL) and now it works
The only problem i have now is that when i enter the game i'm not online. It's saying that "the passed-in key does not activate the expected privilage". Anyone knows something about this. I think i might have entered the wrong key (but the application accepted it !!!).
Thanks and i hope the game will work for all of you.