How Can I Find Xml Node With Defined Position

Set xmlDom = CreateObject("MSXML2.DOMDocument.6.0")

xmlDom.async = False
xmlDom.loadXML "<?xml version='1.0'?>" & _
    "<Root xmlns='MyNameSpace'>" & _
        " <Test> This is a Test " & _
            " <Test2> This is a Test2   " & _
                " <Test3> Node 1 " & _
                " </Test3> " & _
            " </Test2>" & _
        " </Test> " & _
        "  <Test3> Node 2 </Test3>" & _
    "</Root>"
Wscript.Echo ".getProperty( SelectionLanguage ) = " & .getProperty( "SelectionLanguage" )
xmlDom.setProperty "SelectionLanguage", "XPath"
xmlDom.setProperty "SelectionNamespaces", "xmlns:myNS='MyNameSpace'"

Set oNode = xmlDom.selectSingleNode("//myNS:Test3[position()=2]")

Wscript.Echo oNode.xml