We really need to know what modem/router you are using, you will have to go into the next room and turn it upside down and have a look at what it says....
Also when you rang your ISP who where they ??
These are crucial questions when it come to firewalls...
Also you may have a graphics card issue or it could be a Java issue...
Check this link out and follow the steps to configuring Norton 2007 properly....
When you click on incomming rules scroll down to L and select Limewire...
http://www.portforward.com/english/s...y2007index.htm