Norton button is missing from Norton Toolbar, I.E. 8

The "Norton" button is not present in the Norton Toolbar in Internet Explorer 8, but it is present in Firefox 16.0.2.

 

nortonbuttonmissing.JPG

 

system is Windows XP, service pack 3, with NIS v20.2.0.19, and Firefox 16.0.2 and Internet Explorer version 8.