Hi ! I recently update my ISPConfig installation from 22.214.171.124 to 126.96.36.199 and it worked fine except for one point. I found that association between users databases and databases is now 1:n while it was 1:1 before. It seems to be logical. But my problem is that new database users created in ISPConfig are not transmitted in MySQL server. Here is the log of ISPConfig (DEBUG level) when I try to create a database user : Code: [root@ws1 ~]# /usr/local/ispconfig/server/server.sh 08.01.2014-09:17 - DEBUG - Set Lock: /usr/local/ispconfig/server/temp/.ispconfig_lock 08.01.2014-09:17 - DEBUG - Found 1 changes, starting update process. 08.01.2014-09:17 - DEBUG - Calling function 'db_user_insert' from plugin 'mysql_clientdb_plugin' raised by event 'database_user_insert'. 08.01.2014-09:17 - DEBUG - Processed datalog_id 508 08.01.2014-09:17 - DEBUG - Remove Lock: /usr/local/ispconfig/server/temp/.ispconfig_lock finished. The credentials in /usr/local/ispconfig/server/lib/mysql_clientdb.conf are correct. When I try to create a database from ISPConfig it works. When I try to create a database user from phpMyAdmin it works. When I update an existing datable user from ISPConfig it works ! Where should I look for to solve the problem ? Thanks !!