Hello Kasim,
thank you for your support.
last night i get openembedded to run. For linux newbie the whole linux-build system, e.g. autobuild, buildroot, openembedded is very complicated. you must reinstall this, you must configurate this and so on.
now kernel build is ok; i think, i compile now the uboot.
if i have anymore questions i feel free to contact you :-)
and if i have a running system i will write a small howto for dummys