Can you access the Reg Server via your LAN?
Other than that, IP's should work fine.
Here is mine, in case its not the same as that post lol
[Setup]
LocalIP=192.168.0.45
RegPort=7010
SQLIP=127.0.0.1
Username=sa
Password=sapass
MapName=0
Map_X=160
Map_Y=230
LoginPort=7000
LoginSrvPort=5500
LoginSrvIP=127.0.0.1
Account=Account
Game3G=Game3G
CruelDragon3GBaseData=CruelDragon3GBaseData
DispConnect=0
RegUser=1
ChangePassword=0
FindPassword=0
FindHum=0
DieToLift=0