After setting up a new DataBase on another Server, copying the Data from my old database to the new one (Import and Export) and changing the Data in the _config.php, I always get that Message, only db/build/ works. When disabling the dev-Mode in the config, I get an "WebSite Error" Message even at /db/build/.

I wonder where that Group_Unsecure comes from, I searched in the whole php Code and found nothing, in the MySQL Table I found it in the classname enum of the "Group" table. Deleting the 'Group_Unsecure' from the enum doesn't have any effect. /db/build/ will add it again.

I really need help on this, thanks in advance.

EDIT: I also tried to set up the tables by installing a fresh silverstripe and then use /db/build of my real working copy, same problem.

EDIT2: When I create the tables with /db/build instead of the install script or copying the database it works well except of having no administrator. Creating one with phpmyadmin (or copying the data from a working version to my new one) fails, too (same problem).