Hi!
I've solved the problem.
The problem was, that LILO always booted an old Kernel image and not the new I've still compiled (with modules).
'make install' said that lilo.conf is going to be updated but this was false because LILO always started the old image /vmlinuz and not the new in /boot/vmlinuz (maybe my fault in lilo.conf)
For this reason the Kernel booted was not the same the modules were compiled for -> didn't work.
Thanks to all who posted in this thred!!
Maxi