Thanks for yor answer.

But it does not help. The problem is that the file: /etc/ld.so.conf is directly connected to the Knoppix-CD. That means that I'm not able to modify this file. I'm only allowed to read, whether I'm a normal user or super user! Thats very bad! ;-(

I tried also to set the Variable: LD_LIBRARY_PATH with a new directory like "/ramdisk/lib"
and copy there my libraries in, but it does not work either!

Greetings skontox