No RtfContainer of class ...IRtfParagraphContainer

Hi!I'm a newbie thinking in using jfor to translate xsl-fo to rtf
but i keep comimg across this exception:

jfor.INFO:Parsing xsl:fo document...
org.xml.sax.SAXException: IOException in IBuilder: 
org.jfor.jfor.converter.Conve
rterException: No RtfContainer of class 
'org.jfor.jfor.rtflib.rtfdoc.IRtfParagra
phContainer' available for 'org.jfor.jfor.converter.ParagraphBuilder' 
builder

I've browsed google and the foruns but haven't found any clues what might 
be causing it.
I've posted the source code of my xls-fo on
http://pastebin.com/331364

TIA,
CarlosN.


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