I'm so sorry...I have been away on holidays and forgot about you..
Ok... Let's try port forwarding through your Norton Internet Security, in case that's interfering...
These are the instructions...
Port Forwarding for the Norton Internet Security 2007
Also try these tips and see if you have Vista's security Center configured correctly...
Vista’s Security Center ~ IT Professionals
Also you could try updating your Java to the JRE 5.11 (we suggest this version as the JRE 6.1 has had some issues with some users)..
Uninstall your 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 