I thank all of you for your replies !
Maybe I'm a bit stupid, but after all I get the same
error message as before. I set the classpath for the
according jar file. I checked it with "set CLASSPATH"
and my jar is shown.
I also imported this jar correctly into my application,
because this one is running fine inside my eclipse
ide.
I even packed the needed jar archive into my own jar file.
But the result is always the same: "Exception in thread "main" java.lang.NoClassDefFoundError: iaik/pkcs/pkcs11/Module".
*sniff*