[xep-support] rx:overprint question

Hallo everybody,
I´m playing a little bit around with the new feature rx:overprint in XEP4.19.
I can´t get this running properly. I´m getting my text on a background, but the background color is spared. I´m opening my PDF in Acrobat Pro and using the separation-view. After turning off the black color (this is my text), the others colors (the background) are not full colored: they are spared white by the text.
I thought "overprint" will overprint the background and I´m getting the full colored area behind the text.

My question:
Is this the right way it have to be? Are there any mistakes in my fo-document? It is possible to get a little example if I´m wrong?

Regards
Bastian

<?xml version="1.0" encoding="utf-8"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:rx="http://www.renderx.com/XSL/Extensions">
 <fo:layout-master-set>
  <fo:simple-page-master master-name="one_column" page-height="10mm" page-width="10mm">
    <fo:region-body/>
  </fo:simple-page-master>
 </fo:layout-master-set>
 <fo:page-sequence master-reference="one_column">
        <fo:flow flow-name="xsl-region-body">
            <fo:block-container background-color="rgb-icc(29,45,40,#CMYK,1,1,1,0)" >
                        <fo:block rx:overprint="true" color="rgb-icc(0,0,0,#CMYK,0,0,0,1)">text</fo:block>
            </fo:block-container>
        </fo:flow>
    </fo:page-sequence>
</fo:root>

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Received on Tue Mar 22 09:49:24 2011