gif in pdf

I am using the Tomcat server to transform my xml
archive into pdf, the  
not accepted Tomcat the version of xsl:stylesheet,
when making some  
changes to try to decide the problem the Tomcat does
not find the  
figure, where I must place the figure,  as I decide
the problem of the  
version,  very obliged.  

<?xml version="1.0" encoding="utf-8"?> 

    <xsl:stylesheet version="1.0"
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns:fo="http://www.w3.org/1999/XSL/Format">
....

<fo:block text-align="centered">
   <fo:display-graphic
href="url('elisio/teste.gif')"/>
</fo:block>


=====
========================
Elisio Menegueli Pereira
epereira@xxxxxxxxxxxxxxx
========================

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