How to unblock ports

I want to play Ghost Recon 2 on my ps3 and I have to open the ports they are open and i have the firewall off and i have DMZ on but i still cannot connect so I am guessing that its my router that is blocking the ports so how can i unblock them

I have this router..http://catalog.belkin.com/IWCatProductPage.process?Product_Id=459561

Thanks

Hi,

You should find instructions here:

PortForward.com - Free Help Setting up Your Router or Firewall

Hope it helps