Security alert from ISPConfig server

I started to get security alerts from my ISPConfig server tonight.
The message is: "The number of ISPConfig administrator users has changed. Old:1 New:0
I can login into ISPConfig panel, but it's very slow and sometimes all icons etc. doesn't show up correctly.
Server is Debian 7 and I allready updated ISPConfig into 3.0.5.4p8
Mysql root password is right and I can login into mysql server.

 

I got this warning in ISPConfig panel:
#0 db->query(SELECT `value` FROM `sys_config` WHERE `group` = 'interface' AND `name` = 'session_timeout') called at [/usr/local/ispconfig/interface/lib/classes/db_mysql.inc.php:225] #1 db->queryOneRecord(SELECT `value` FROM `sys_config` WHERE `group` = 'interface' AND `name` = 'session_timeout') called at [/usr/local/ispconfig/interface/lib/app.inc.php:156] #2 app->conf(interface, session_timeout) called at [/usr/local/ispconfig/interface/lib/app.inc.php:72] #3 app->__construct() called at [/usr/local/ispconfig/interface/lib/app.inc.php:330] #4 require_once(/usr/local/ispconfig/interface/lib/app.inc.php) called at [/usr/local/ispconfig/interface/web/content.php:32] #0 db->query(SELECT config FROM sys_ini WHERE sysini_id = 1) called at [/usr/local/ispconfig/interface/lib/classes/db_mysql.inc.php:225] #1 db->queryOneRecord(SELECT config FROM sys_ini WHERE sysini_id = 1) called at [/usr/local/ispconfig/interface/lib/classes/getconf.inc.php:53] #2 getconf->get_global_config(misc) called at [/usr/local/ispconfig/interface/web/login/index.php:62] #3 login_index->render() called at [/usr/local/ispconfig/interface/web/content.php:52]

 

dbispconfig database with phpmyadmin ??

 

I did this once and the warning message went away until today same messages again.
I ran repair again. No messages (yet)...