1. Server didn't answer = Server down, can't do anything about it unless it have a IP of 0.0.0.0
2. Different Classtables = your version of the game does not match the server. AKA, either the server or your game is outdated
Well if the game is still at 100%, there's nothin u can do about that.
If u have the server owner's email, scream at him and say update his goddamn server. At the moment, you can only wait for the server admins to update. There's nothing else you can do.
BTW, did u install Setti masterserver listing?