MapServerInfo.dat > Global IP 5 times and keep the S in front
Your Globel IP is here
Season 3 files can be added of course but these require professional skills
Make your own launcher with launcher build :
Enable options
Show Server status
IP/Hostname : Your Local IP
Port : 44405
If still no works go MuServer>Tools>Client Tools>Main Editor and edit the 2 main.exe in client with your Global IP.
If still no works then you got IPs or sql passwords and files wrong.I recommend you re-follow my guide slowly,step by step,and ask if there is anything you are not sure about.
Thank you and enjoy! =P