Courier-imap

Hi, I'm trying to use Courier-imap with Mysql authentication. As far as I can tell, this does not work. I just installed it from the 9.1 DVD. Anyone has other experiences ? I previously compiled my own version (for 9.0), so that's no real problem, but making an RPM will, since I never did this. Maybe a good moment to try. TIA Koenraad Lelong.