I previously used NAV's email scanning ("auto protect"), but would like to switch to ZA's email scanning. Despite disabling Norton's auto protect and re-booting the system, when I go to ZA's Antivirus Advanced options and select Enable Email Scanning (recommended), I receive the message "Zone Alarm antivirus detected a conflict with a third party software. Email scanning will not be enabled untin the conflict has been resolved. " Supposedly, I've disabled the Norton function. Any recomendations? Thanks.

Operating System:Windows XP Home Edition
Product Name:ZoneAlarm Antivirus
Software Version: