Hey, thanks for your help.
I am one steep further.
I made a local Backup, an installed GJ again, then there was a message that some phrases in the language-file are already there. It was a problem with the uddeIM-System. So, I killed uddeIM completely and now it works! But only local. I transferred to the server, bad again, but I am on the right way. uddeIM wasn't completely deleted, there are some information in the module-table in the msql-datas... Hopefully I will clean it all and give you a good message. But I think it is at least a problem with the combination with uddeIM. CB and GJ are well done.
Have a good day
greetings Mapache
