Norton toolbar will not work with FF 10.0.2

I am also having problems getting Norton tool bar to work with FF 10.0.2. I recently purchased a new computer running Windows 7 Pro. I deleted Macafee from the computer and installed Norton through Comcast.  "About" reports Norton as version 5.0.0.125. When I attempt  to enable FF10.0.2, Norton gives me a message that FF10.0.2 is Norton. On my old computer running XP Pro, FF 10.0.2 works just fine. There the Norton version is reported as 5.2.0.13. I have removed and reinstalled Norton on the Windows 7 computer but got version 5.0.0.125 both times. Do I need a newer version of Norton and if so how do I get it?

 

 

[edit: Clarified subject.]