Ok go to the 1st link and follow the instructions for setting up a static IP address.
Then go to the second link and follow the instructions.
This is assuming you gave the right router model there are several BEFW11S4 models. I can not make it any simpler than this so don't ask.
http://portforward.com/linksys/befw11s4v1-dhcp.htm http://portforward.com/english/route...4/Limewire.htm