Problem in Colour Management X6 vs. X4

Hi,

I´d updated a few weeks ago to CorelDraw X6(from X4).

There are a few improvements I like much but there is a problem in the colour settings for pdf...

If I convert a CMYK Draw X4 doc to pdf(pdf for print)....Black is Black means (100%K).

But if I do the same with X6 I have no 100%K - I got all colours in the black part.

I cant send this to the printery...where is the mistake in the colour management???

I tried a few changes in the colour management but could not succeed.

For info - using CorelDraw X6 on windows 7 - CMYK and have Acrobat X to proof the output.

Thanks for your help!