xsl:call-template with-param

i am getting a 'variable not defined' error when I call a template and
specify a 'with-param' (<xsl:with-param name="ITEM_NO"
select="@itemNumber"/>) variable to pass to the template.  I refer to the
variable in the template as <xsl:value-of select="$ITEM_NO"/> .  the XML4J
parser accepts this, but XT coughs .  Is this a namespace problem or a
syntax problem ?

thanks,
Paul


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