MS.Internal.Xml.Xpath.XpathSelectionIterator instead of value of text node

[mehrlicht]

Hi.

Why Am I getting
MS.Internal.Xml.Xpath.XpathSelectionIterator
instead of the value of a text node
on this line of code

Dim encoding As New System.Text.UTF8Encoding(True)
Dim reader As New System.IO.StreamReader(temparray(0).ToString, encoding)
Dim x As XPathDocument = New XPathDocument(reader)
reader.Close() '?
Dim nav As XPathNavigator
nav = x.CreateNavigator()
nav.Evaluate("//*[name()='mcd-Lol'][*[name()='mcd-Number' and text()='1'] and *[name()='mcd-Tamanho' and text()='2']]//*[name()='mcd-Den']/text()")

whereas in this online tester
http://codebeautify.org/Xpath-Tester
it works pwefectly?

The Xml only has text nodes and all with namespaces.

<?xml version="1.0" encoding="UTF-8" ?>
    <Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2"
    xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
    xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
     xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"
    xmlns:mcd="urn:acss:ccf:facturacaoelectronica:schema:xsd:Normalizados">
    <ext:UBLExtensions>
    <ext:UBLExtension>
    <ext:ExtensionVersionID>NormalizadosExtension:1.0</ext:ExtensionVersionID>
    <ext:ExtensionContent>
    <mcd:NormalizadosExtension>
<mcd:TotalCare>134.49</mcd:TotalCare>
-<mcd:Lol>
<mcd:Number>1</mcd:Number>
<mcd:Tamanho>2</mcd:Tamanho>
<mcd:Area>Z</mcd:Area>
<mcd:TotalCare>124.94</mcd:TotalCare>
-<mcd:Qual>
<mcd:Area>Z</mcd:Area>
<mcd:NumeroQual>1040192667866500</mcd:NumeroQual>
<mcd:Data>2011-11-29</mcd:Data>
-<mcd:Care>
<mcd:NumeroLinha>1</mcd:NumeroLinha>
<mcd:Den>facial</mcd:Den>
<mcd:Quant>1</mcd:Quant>
</mcd:Care>
...
</mcd:Qual>
...
</mcd:Lol>
...

Thanks