I post my problem once again here, because no one could help me.
Since one day, I can no longer log into the admin section. after input of admin / admin, I get directly into the admin section for login again.
To erase the user.php does not help.. chmod777 is correct.
I'm also getting a bit disappointed by the support. just one feedback, and then I heard nothing more.
perhaps someone in this forum can help me.
many thanks and happy new year
Frank M.