See http://forum.ipfire.org/index.php/topic,7365.0.html for information.
Turns out the CCD does not work if the user has embedded spaces in the CN (field labeled "User's full name or system hostname:" on Road Warrior creation screen). I don't remember exactly, but I believe OpenSSL or OpenVPN itself converts spaces to underscores. You can test this by creating a user, embedding spaces, and then on the server cat /var/log/ovpnserver.log
You will note the Common Name has spaces converted to underscores.
The solution is to write the ccd file with underscores, ie $filename =~ s/ /_/gi;
If someone will point me to the script that creates that, I will be happy to patch and test, then send you the diff.
Rod
NOTE: I have spent a little time looking at this and solving it for an existing installation, but I intend to pull an old router out and reconfigure it for a controlled test, unless someone else can verify my findings independently.
Rod