attributes of XML in NAV 2015

Hi, i hope any can help me, i have the next situation:
I have a XML document, is an charge of Canceling, need obatain the attribute values of a element:
my xml is the next

<?xml version="1.0"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt;
  <s:Body>
    <CancelaCFDResponse xmlns="http://cancelacfd.sat.gob.mx"&gt;
      <CancelaCFDResult Fecha="2016-01-18T16:13:25.1273627" RfcEmisor="CCO910614DN5">
        <Folios>
          <UUID>CE48E873-1409-4566-8619-0ACC449AD5E5</UUID>
          <EstatusUUID>201</EstatusUUID>
        </Folios>
        <Signature Id="SelloSAT" xmlns="http://www.w3.org/2000/09/xmldsig#"&gt;
          <SignedInfo>
            <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315&quot; />
            <SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-sha512&quot; />
            <Reference URI="">
              <Transforms>
                <Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116"&gt;
                  <XPath>not(ancestor-or-self::*[local-name()='Signature'])</XPath>
                </Transform>
              </Transforms>
              <DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha512&quot; />
              <DigestValue>rMD8d4QDZqyUHGWJz0flUQd1E27NsFBDosM6s++whMCjCW3dx92HTIQlvF2PFfNPnACwgkvksQ0C/7XpQ==</DigestValue>
            </Reference>
          </SignedInfo>
          <SignatureValue>0seP9bfry6PTwWXP9RsSs2+JCsI8o87ZHWtOix+1n76ZeA8NL1rWtQTr1BOEJ+Q0qezp3qyOYRl6l5AgxgEM8Q==</SignatureValu
          <KeyInfo>
            <KeyName>00001088800000016</KeyName>
            <KeyValue>
              <RSAKeyValue>
                <Modulus>xnL2zDPtH5jDsAZDTIfMqbKGrve+At8Kyx2EZvbfXbpK9uVExWS874oMelFzNq69/YqSReT3I7I8wr+joy5O7ouZH+4KWdIGp4Si6lHe0kntxzNmuuKyOPkJ9tMcntnFmQ4bfxFxlg/Ud2hCtuoy3j2xYkIXu5O4pGM98Nz8pAM=</Modulus>
                <Exponent>AQAB</Exponent>
              </RSAKeyValue>
            </KeyValue>
          </KeyInfo>
        </Signature>
      </CancelaCFDResult>
    </CancelaCFDResponse>
  </s:Body>
</s:Envelope>

I need obtain this

CancelaCFDResult Fecha="2016-01-18T16:13:25.1273627" RfcEmisor="CCO910614DN5"

and save into a text the Attribute 'FECHA', and in a second variable the 'RfcEmisor'.

i cant get the text of elements, i have this for read this but dont returnme those attributes:

      IF ISCLEAR(lautxmldocument) THEN
      CREATE(lautxmldocument,FALSE, TRUE);
      
      lautxmldocument.load(PathCFDI);
      lautxmlnodelist := lautxmldocument.getElementsByTagName('UUID');
      lautxmlnodelist2 := lautxmldocument.getElementsByTagName('EstatusUUID');
      lautxmlnode := lautxmlnodelist.nextNode;
      lautxmlnode2 := lautxmlnodelist2.nextNode;
      lautxmlnodelist3 := lautxmldocument.childNodes;
      FOR i := 0 TO lautxmlnodelist3.length() - 1 DO BEGIN
        lautatributo := lautxmlnodelist3.item(i);
        IF NOT ISCLEAR(lautatributo)THEN
          lautxmlatributo := lautatributo.getAttributeNode('Fecha');
        IF NOT ISCLEAR(lautxmlatributo) THEN
          tfecha := lautxmlatributo.value;
      END;

      tfecha:= lautatributo.nodeValue;
      tuuid := lautxmlnode.text;
      testatusuuid := lautxmlnode2.text;
      fechacancelacion := COPYSTR(tfecha,1, 19);
      testatusuuid := lautxmlnode2.text;
      "Date/Time Canceled" := fechacancelacion;
      "Fiscal Invoice Number PAC" := tuuid;
      "Date/Time Canceled" := fechacancelacion;
      IF testatusuuid = '201' THEN BEGIN
        "Electronic Document Status" := "Electronic Document Status"::Canceled;
        "Error Code" := lautxmlnode2.text;
        "Error Description" := 'Cancelado';
      END;[s][s][/s][/s]

Any idea