heh2, I don't think you are in a position to judge anyone else's English skills. I don't know if you ever looked at your own posts, but they are pretty bad. And to be honest, I think Masato's English is actually quite good.
On-topic. Can you tell us what exactly what you did in your router/modem ? If possible some screenshots would be nice. Remember to make passwords etc. unreadable.
I also think your modem shouldn't be blocking anything. At least i never seen it before.
To go to the config page of your router type in your browser's address bar "192.168.1.1" or "192.168.0.1" and log in to your router. Alternatively you can press win+r, type "cmd", press enter, type "ipconfig", press enter and use the number right after "Default Gateway. . . . . :" .
In your config page I think you should go to Advanced -> Internet -> Port forwarding.
Set the protocol to "Both" if possible just to make sure that isn't the problem. If there's no sush option just set it to UDP. Set the internal and external port to 8303. If possible leave the "to IP address" part empty. Otherwise use "ipconfig" (as shown above) again and fill in the number right after " IPv4 Address. . . . . .: ". Don' t forget to press save when your done.
Your also sure your server is using the right port number? It should be the same as the one you just opened (8303). If it's not, change "sv_port" in your server config file.
If this doesn't work my last idea is that it could be a firewall. Have you installed any special anti virus packages ? (like Norton, Avast! etc.).
I hope this helps
SNAK3People who think they know everything are a great annoyance to those of us who do.