Pleez assist me

[SaQSoN]

To play on-line, both client and server must have exactly the same version of the game.

So, if you are trying to connect to a friend over LAN or Internet you both should have same version of the game. Otherwise it won't work. If you both have same game version, but still not able to connect, then there could be also other problems, such as firewall settings, or your network setup, etc.