I am working on a project converting XML to PTF, RDF.
I use FOP and JFOR to do that. The XML-FO
 file i produce by Xalan works for FOP perfectly,
 but not for JFOR.

I used the following versions for xalan and xerces.

xalan200.jar xerces220.jar

would you give any suggestions for this problem?

Apart from this, what do you mean with "doesn't work"?
AFAIK, JFOR does not implement all that much, so it's
no surprise if some stuff doesn't show up in the result.