Ok I changed db user and password in usr/local/ispconfig/server/lib/config.php to db user and password same in usr/local/ispconfig/server/lib/mysql_clientdb.conf and now after backup in update its type this
mysqldump: Got error: 23: Out of resources when opening file './dbispconfig/web_folder.MYD' (Errcode: 24) when using LOCK TABLES
Checking ISPConfig database ..
ispconfig_install.log still type
Fri Jul 27 10:50:01 CEST 2012 - [ISPConfig] - /tmp/ispconfig3_install/install/lib/update.lib.php, Line 38: read in ispconfig3.sql
any suggestions, help? Thanks