Alexander.013 is right!
You need to clean your hostfile!
Here is a link!
Host file need to be clean!
Only with localhost ip!
I think it will help.
I'm having the same problem with mac osx lion and steam... I can't believe how you pay for the original game, it doesn't work and you don't have a fix... not even an answer from ubisoft. This is just disrespectful with us, customers. I just want to play an original game, I don't think this is too much to ask. But I've been searching for a while now and it looks like this situation have been happening for a few months now, maybe it'll be easier to play if you just download a cracked version without ubisoft launcher.
I got my driver working after I follow the host editing instructions from odd duck
I didn't have to download the game launcher, I only erased those lines from hosts and it's working now