I do apologise about the Shareaza temp stand-in port test but it does work if applied correctly.

It sounds like your firewall is not properly configured. Please see the above instruction link for setting up XP firewall.

Can you be more specific about your speedtouch. Do you know or can you find out the model no. This might be very important! Is there a UPnP switch on it? If yes turn it on! Do you use it via USB or ethernet connection interfacing?