Make sure every ip number on the ethernet cards are 1 digit away from each other. For example I use 10.0.0.6 and 10.0.0.7 on my lan. Set this by going to the network section of the control pannel, and click on tcp/ip for your ethernet card. Then click properties. When you are all set with that, go to the command prompt and ping each other (for example: c:\>ping 10.0.0.1 ). Make sure that you get a response, if not something with your network is wrong. Also if your trying to play the original unreal get the 225 patch. It's still possible to play a lan game without it, but I have never been successfull at setting up a game without that patch. If your playing UT then version 400 should be fine.