Hi,
so I could solve now all of my problems. Somehow yast-ncurces was missing in the packages list and therefore everything what is normaly done after the first boot missed. Thanks for all the help!
One last question: How can I redirect the console ? For the old system (SLES10SP2)
APPEND initrd=initrd.sles-10SP2-x86_64 console=tty0 console=ttyS0,115200n8 ...
was working. Not for SLES11SP1.