@ Iain + Bubbaspa
Normally when you get endless loop its because a popup blocker is working. This is how to turn of blocker in Firefox;
Go to Edit/Preferences/Content (in Firefox toolbar) and uncheck block popup windows.
or
Click on the exceptions button on the right of the block popup windows selection, add www.wgt.com to the list of allowed websites. (This is best method because you still have your blocker working for when you surfing the net.)
If still not working try turning of Firewalls etc to see if there the problem as sometimes they have popup blockers on them aswell.
If still not working try the most recent version of Abode Flash Player
Abode Flash Player 10 beta
http://labs.adobe.com/downloads/flashplayer10.html
Hope this helps, Gooshi