Sorry for the lack of information.
I am on Windows XP. As for firewalls, I'm unsure, I have AVG Free, SiSraid and good ol' Windows Firewall... and I do have a brick wall in front of the globe in the bottom left hand corner. A 1GB of ram, and 55GB of hard drive space remaining, I am currently with Tiscali Broadband and have a D-Link Router (I will add the type later - I am at work at the moment!

) The trouble is currently occuring from my home.
I have the latest version of LW, 4.12 and have Java Update 11.
When I conduct the test... it goes very quickly to a white screen with 'Your test worked!' in Times New Roman font in black.
I am currently sharing my Internet with another computer, download rates are normally around 110-135kb/s.
I use LW often, and this is a new problem for me.
If you need any more information, don't hesitate to ask.
Thanks for helping!
Conna.