I think that good idea is to read Sygate forum:
http://forums.sygate.com/vb/showthre...ther+firewalls
Can Sygate Firewall coexist with other firewalls?
Products:
Sygate® Personal Firewall STD
Sygate® Personal Firewall Pro
Operating systems:
All supported operating systems.

Details:
No, Sygate® Personal Firewall STD and Sygate® Personal Firewall Pro will not function while another firewall are running. In order to properly run SPF you will need to uninstall any other software firewalls prior to installing SPF

Keywords:
Firewall, ICF, ZoneAlarm, Norton, BlackICE, Agnitum Outpost,