making chapter titles the running header: how?

Hi, there, 

I have a print book which needs simply a chapter title as the running header. I know I have done  it before, but somehow I can't do it  now. 

I would have guessed that using     <xsl:param name="marker.section.level">1</xsl:param> would make this happen, but it didn't. Using the value 1 or 2 seems to produce the same result.

I am using docbook-xsl-ns-1.78.1/fo/docbook.xsl

I am trying to work through Bob's example http://www.sagehill.net/docbookxsl/PrintHeaders.html , but I was wondering if I am just missing something obvious -- or maybe there's something odd about my xsl. 

Thanks. 

-- 
Robert Nagle
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