error while configuring gtk-doc

["kiran kafle" <kafle_kiran hotmail com>]

while  configuring gtk-doc in rh 9

checking for xsltproc... /usr/local/bin/xsltproc
checking for XML catalog (/etc/xml/catalog)... found
checking for xmlcatalog... /usr/local/bin/xmlcatalog
checking for DocBook XML DTD V4.1.2 in XML catalog... found
checking for DocBook XSL Stylesheets in XML catalog... not found
configure: error: could not find DocBook XSL Stylesheets in XML catalog

so what i need to do please help

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