fo:flow within fo:page-sequence

[Wolf Gustavo (SGC-EXT)]

Hi,
      in the XML bible, chap. 15, I read that for a  fo:page-sequence I can
have one fo:flow per region, i.e.: <fo:flow flow-name="xsl-region-body">,
and then another like <fo:flow flow-name="xsl-region-after.">, etc,  which
makes 5 in total per page.
However, when I try to define one flow for body and another for after, Fop
tells me that "only a single fo:flow admitted per fo:page-sequence".
Does anybody know how to solve this?
Thanks a lot,     Gustavo