I Know but please Help??

[DeDRAGE]

Guys here is a question that you guys have had to answer a million times. I am trying to set up a router. The router Im using is Trendware Model TW100-S4W1CA. Of course I have figured out how to open the ports and tried everything I can think of. I finally opened a wide range of ports that allows others to join the server. But now I cant join from the other pc set up on the router. If anyone can help me it would be much appriciated.