IP has some types: LAN IP, WAN IP, local IP, and others
say it as "WAN IP".
on clientinfo, change it to: <address>your.wan.ip.address</address>
on char_athena.conf:
login_ip: 127.0.0.1
char_ip: your.wan.ip.address
on map_athena.conf:
char_ip: 127.0.0.1
map_ip: your.wan.ip.address
then, forward ports: 80 (if needed), 6900, 5121, 6121 to your PC that's running the RO server. refer http://portforward.com
this should do the trick. except if your ISP isn't allowing you to open ports. If they do, ask them to open it.
your wan ip address: http://whatismyip.com