Usually when you see "page cannot be displayed" it means that your ISP has some sort of bandwidth shaping in place when it comes to p2p..
Even though your router has been disconected, what is the make and model number for your modem??
You could also try uninstalling all versions of Java from the add/remove programs and then re-install the JRE 5.11 offline version....
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11
If that does not help with your problem try deleting your preference folder/s...
Fixes for Limewire when LW isn't operating as it should http://www.gnutellaforums.com/genera...der-vista.html
Last but not least try uninstalling Norton, uninstalling limewire, re-installing limewire and then re-install Norton...
By the way is it Norton Internet Security 2007 you are using ??