You have to be patient with Comodo as they have way too many projects going on all at once ;)
I’ve been trying to use CSE for a few months now and it’s gone from completely unusable to minor errors in just 2 releases so they are making progress on it.
I’ve been playing with this on a couple different workstations and it looks like it works with Outlook 2007 but not 2003. That doesn’t solve anything, but hopefully narrows it down a bit.