"Filtering" Doesn't Work

[bebing2]

Filtering is in quotes, because I only want to execute a command when certain emails are received. I tested with the more generic Configuration -> Common Preferences:
Execute command when new messages arrive
I have a command to play a sound.
That works and is tested.
The problem is any Filter I create will not trigger and play the same command that I tested with the generic feature:
Example:
Configuration -> Filter Settings
If any of the following condition matches
Subject contains test

Then I send an email with "test" in the subject.
I collect mail and it does not trigger the filter or the command
It does work with the generic "Execute command when new messages arrive"

I am assuming this functionality was never finished?