i think some step
most first thing check virus...
after...
1. check your network
2. check alive your game server ( this command send window commend : telnet "ur game login server IP" 2106)
3. client repair for l2 luncher
wish good luck..
i'm playing private server
i don't know server version...
when l2w run(L2.exe file finded)
client program not running ;;
um...
sorry for my bad english