Toolbars and inability to update.

I have Mozilla Firefox 7.0.1, when I attempt to display the Norton Toolbar, by clicking on 'View' -> 'Toolbars', Norton Toolbar is not displayed in the drop-down list.

 

I have attempted three time to download my new NIS.  I keep getting locked into cycles of, first NISDownloader.exe, then AutoDetectPkg.exe, and then NISDownloader.exe again.