Creating PDF file with CMYK profile, failed

From Openoffice 3.2.1 I tried to create a PDF file (Version 1.0) with

settings "CMYK", the result is  a "RGB" file. I tried the same from

OpenOFffice using the "Export" function, the result is still a "RGB" file.

What do I wrong?

This is my question too.

Colorspace in PDF File shows RGB even if I choose setting "PDF>Use colorspace CMYK"

Why is it so?

 

Question is still open.

Question is still open.