I don't know how exactly netplay works, but I guess you need to forward ports on your router.
(This only works if your router gets a Public IP, if it's something like 10.X.X.X, it won't work and you should blame your ISP)
(This only works if your router gets a Public IP, if it's something like 10.X.X.X, it won't work and you should blame your ISP)
