I was able to have SER working with MySql database. I can see the location table updated with the registered users. However if I add the following line to ser.cfg to use digest authentication and restart ser, then I saw the following errors in /var/log/messages and ser failed to start. ser.cfg ---------- # Uncomment this if you want to use digest authentication if (!www_authenticate("10.1.104.254", "subscriber")) { www_challenge("10.1.104.254", "0"); break; }; /var/log/messages: -------------------------- Feb 17 16:25:39 localhost ./ser[32533]: authdb_fixup: Invalid table version (use ser_mysql.sh reinstall) Feb 17 16:25:39 localhost ./ser[32533]: ERROR: fix_expr : fix_actions error I am using the presence server snapshot. There is no reinstall for this version of ser_mysql.sh. And I made no change to the database or version table. So what is it complaining? I found this strange. - ming