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[/quote]What database engine are you using? MySQL?
[/quote]
Yes MYSQL.
I found the solution
Cause
MySQL 5.0 and higher have a strict mode that is currenty incompatible with a number of queries in Drupal. The Windows Installer from MySQL.com enables this strict mode by default.
Workaround
There are several workarounds
1. Replace in my.ini the current sql-mode line with sql-mode="MYSQL40"
2. Start MySQL with the option --sql-mode="MYSQL40"
3. Execute the query SET GLOBAL sql_mode='MYSQL40'
MySQL needs to be restarted before changes in my.ini have an effect. My.ini can be found in the MySQL installation directory or the Windows directory, depending on your configuration.
Note: After switching MySQL mode you have to recreate your Drupal database or your site will not function properly.