Kaminari
The Link below may help there is more information in there about Windows firewall than you will ever want to know.
http://support.microsoft.com/default.aspx?kbid=875357
I can not find any Info on you model But I believe it is a Westell 6100 The link below will take you to the port forward set up page for the Westel 6100. Make sure you set up a static IP just follow the instructions.
http://www.portforward.com/english/r...0/Limewire.htm