SpywareBlaster vs. XXXToolbar.com Help

Hi, I’m using SpywareBlaster 3.1. There is one thing I don’t understand I have enabled all protection, but in “Restricted Sites” section, after I close SpywareBlaster and open it again the item “XXXToolbar” is always unchecked, and in Registry is created key: “HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\xxxtoolbar.com”
I delete the “RegKey”, check “XXXToolbar” again, press button “Protect Against checked Items”, and after 2 minutes there’s that “RegKey” back and “XXXToolbar” is not checked in “SpywareBlater” anymore. So, where is the problem? I’m using a “Google Toolbar” free not registered edition.