Check that the IPs you've put in the config files are correct and that your client IP is right (if you're using LAN you can put 127.0.0.1 in your server files and use 192.168.x.x to connect). If you're trying to use WAN then it's most likely that you haven't forwarded the correct ports.
You Dowcload This File Laucher http://a3angelz.dyndns.org/4/games/A3/A3Launcher.rar
Unzip to client Projact a3 ........>>>> open file Wylista3.lst (with notepage) config name server ang ip server >>>>>>>>save >>>>>run a3launcher.exe >>>>>>>finish >>>
ip can't board login >>>>> you set Dist.lay Sreen solution to 1024 x760..... >>>>>run a3launcher.exe >>>>>ok !