Norton Toolbar Disappears in Firefox

Does anyone know what to do if the Norton Toolbar disappears in Firefox? I had the Norton toolbar displayed, but it just disappeared one day. It still shows up in my list of add-ons, and it says it is enabled, but it doesn't appear in the browser. There's also an add-on with the Norton logo called "%s1 %s2" and its description reads "%s3". This add-on is also enabled. Is this a broken add-on? I couldn't find anything online about this add-on.

 

Here is some system information:

 

Firefox v. 2.0.0.20

Norton Internet Security 2009 

The add-on in my Firefox list is called "Norton IPS"

I am currently running NoScript v. 1.9.1.4

 

Please let me know if you need any more information.