from the Comodo forums:
"A lot of users have been curious about the current version of Comodo Firewall Pro and Windows Vista compatibility, hopefully this will answer a few questions.

1. Currently Comodo Firewall Pro 2.4 does not support any version of Windows Vista and does not support any version of Windows that is 64 bit.

2. Windows Vista and Windows 64 bit compatibility will be added in the next version of Comodo Firewall (version 3.0.x.x).

3. The current release date for the beta of the next version of Comodo Firewall Pro is currently scheduled for May 14, 2007. However, this is not carved in stone and it may change."


http://forums.comodo.com/index.php/topic,6927.0.html