Thank Till and Moglia for your help. The problem with the mysql _user is solved.
I will try to fix it self in my DEV Enviroment. Till please can you tell me which files i have to edit for fix. I think i lock the Field on "Edit". After this the Customer can not Edit the name but this is not necessary. I will post the solution after my first 5 free days
this year on mid of next week.
Another question. We wrote at this time Customer Manual for ISP3 and i will get you a little back, where can i post it that the community has a benefit.