No groups after update

I installed Openfire 3.7 on a new Slackware server and migrated the MySQL DB for the old server (Openfire 3.5, Ubuntu). For the new server i used the openfire.xml from the old server. The settings of the .xml got transfered to the DB. We use MS AD authentication. We used to create our own groups. On the new server the groups do not appear! Is there a way i can get the groups to the new server? Thanks for your help.