[Help] How to create 2 gameservers on 1 login server ?

Hello all, I tried searching and there are no posts about this. I want to make 2 gameservers on 1 loginserver (2 gameservers on 2 PCs, 1 login server on another PC--->3 PCs. 3 PCs have difference IP Address)
I tried to run loginserver, forward port 9014. Then config 2 game servers to connect to the loginserver by changing Loginserver IP in the gameserver.properties. (already register 2 gameservers with the loginserver). The result is: 2 gameservers successfully connected to loginserver. But there's a problem, I used a C4 client from another PC (4th PC, 4th IP Address) to connect to the loginserver (I use the loginserver's IP address for the L2.ini). The client successfully connected to loginserver and 2 gameservers are online (I can see the 2 gameservers' status on the server selection list), but I can't connect to any gameserver. What's wrong ? Please help me. Thank you very much. (Opened all needing ports: 2106, 7777 on 2 routers of 2 gameservers and 2106, 9014 on loginserver's router; put right IPs on External IP Address line on 3 servers).

did you try to change the port for the second gameserver to 7778, and then open the ports from your loginserver ?