I did try your ideas (and several over variations). I just attempted your single quotes again and it's still a no go.
The syntax seems valid in a SQL software, but cbSubs does not seem to run it. I even used a standard field (the state example below), and it runs in SQL but not in cbSubs. Could it be something to do with the way the subscription is set up? Is there a way to post results of the SQL string to a log for debugging?
To test, I am manually adding the subscription to the user account from the back-end.
Your help is greatly appreciated and I look forward to getting to the bottom of this.
Todd Fletcher