Norton Toolbar will not activate in Firefox 3.5. Running NIS2010 trial

I was using the Norton Internet Security 2010 Beta and everything was working fine (including Norton Toolbar).  When my Beta license expired yesterday, I uninstalled the beta and installed a trial version of the released version of 2010.  (I am running Windows 7 RC).  Now, for some reason, the Norton Toolbar will not activate in Firefox.  When I look at add-ons, it says "this addon will be activated with firefox restarts"  but no matter how many times I restart Firefox, it says the same thing.  I even tried rebooting my computer in case there was a rogue process running somewhere that would not allow Firefox to restart completely.

 

Any Suggestions will be appreciated.