The Registration tab of my Zonealarm 8.0 installation tells me "this copy of zonealarm has not been registered", even though I have pressed the "Change Reg." button several times and provided my registration information.
It also shows a upgrade nag-screen every time I start the computer. What can I do about it?

Operating System:Windows Vista Home Premium
Software Version:8.0
Product Name:ZoneAlarm (Free)