Are you using a modem or router?
Router: make sure ports 7000,7100,7200 are forwarded
(about all I know about routers,=p)
Modem:
Only need to change 2 ips to run live server.
C:/mirserver/gamegate/Config.txt - GateAddr to ip addr.
C:/mirserver/LoginSrv/!ADDRTBL - 2nd and 3rd one to ip addr.
Evidentally you have an ip wrong somewhere. If the accounts made are saved to the DB, then it must be either in loginsrv or gamegate.