adding a logo to a document header

Hi guys,

I would like to insert a logo on both even and odd pages, but for some reason the compiler complains as if the image itself is not found. Please review the customization I added, and tell me what is wrong?

<xsl:template name="header.content">
  <xsl:param name="pageclass" select="''"/>
  <xsl:param name="sequence" select="''"/>
  <xsl:param name="position" select="''"/>
  <xsl:param name="gentext-key" select="''"/>
 
<!--Adding a logo to the page header
<xsl:param name="header.image.filename" select="logo.gif"/> <!--in a local folder-->
  <fo:block>
    <xsl:choose>
  <xsl:when test="$position = 'left'">
    <fo:external-graphic content-height="1.2cm">
      <xsl:attribute name="src">
    <xsl:call-template name="fo-external-image">
      <xsl:with-param name="filename" select="$header.image.filename"/>
    </xsl:call-template>
      </xsl:attribute>
    </fo:external-graphic>
  </xsl:when>
  </xsl:choose>
  </fo:block>-->
....
</xsl:template>

Regards,
Roman

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