comodo v4 crashing

CPU: 32bit
OS: Vista SP2 + latest patches + UAC Enabled and Administrator Account.
Security: Avira Premium 10 + CIS V4 (Antivirus and Sandbox Disabled) Defence +:Paraniod Firewall:Custom Policy
When any alert comes up defence + or firewall clicking on the process name freezes and then comodo freezes and disappears from the task bar notification icon area. I have to load comodo again.
No problems on XP SP3 + latest patches and same comodo settings.