msxsl:script and selectSingleNode problem

Hi,
   I am getting this strange problem. Let me give my xml and script function 
before I explain my problem.

   my xml:

        <Items>
                <book>My book Title</book>
                <pencil>My pencil length</pencil>
                <pen>My pen color</pen>
        </items>


  my xslt:
        <xsl:stylesheet version="1.0" xmlns="" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
xmlns:msxsl="urn:schemas-microsoft-com:xslt" 
xmlns:scrdt="urn:reval-com:scripts:datatypes">
        <xsl:template match="/">
                        <xsl:call-template name="callInit">
                                <xsl:with-param name="itemNode" select="."/>
                        </xsl:call-template>
        </xsl:template>
        <xsl:template name="callInit">
                <xsl:param name="itemNode"/>
                <xsl:value-of select="scrdt:init($itemNode)"/>                  
        
        </xsl:template>
      <msxsl:script language="JScript" implements-prefix="scrdt"><![CDATA[
        function init(itemNode)
        {
                if( !itemNode.length) return "";

                var val = itemNode.item(0).selectSingleNode('book');

                //var val = itemNode.item(0).firstChild;
                
                if(val!=null)
                        return val.text;

                return "Error";
        }
        ]]></msxsl:script>

        </xsl:stylesheet>

  
     So my problem is, when ever I transform my xml with this template, it is 
printing "Error". It seems like it is not able to get to "book" node when I use 
selectSingleNode("book"). But variety is when ever I access it as .firstChild, 
it is recognizing  the node  and printing the correct value. 

     I have no idea what is going on there. Any leads will be appreciated.


~Mur


        

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