Winlogon is blocked?

Installed Comodo on my win2k machine, which is on a Novell network.
For some odd reason the winlogon-command is not allowed to pass through the firewall, even though it has been allowed to it numerous times.
It keeps saying that it will send information to Comodo Webpage for further analysis, but nothing happens. I have to set the firewall to Allow All, which obviously isn’t good, to be able to access the network ressources.
What can be done?