Hello Andreas,
thank you very much, now it looks like before!
I’ll try upgrading to 1.6 and try if it is working, too.
Thanks to virtual machine teqnique I can use a VM-snapshot, since downgrading back from 1.6 to 1.5 is not supportet, I learned from my last try @ version 1.6 
Thanks again and all the best for you
Best regards
Marco