The Force Field Tool bar does not display on my Firefox Browser. In the Add-ons menu, it shows the Toolbar as being installed. I've tried an un-instal and re-install with no luck. I also have IE8 and the Tool bar is displayed there. Is this a known issue with Firefox, or am I missing something?

Operating System:Windows XP Home Edition
Software Version:8.0
Product Name:ZoneAlarm Extreme Security