responsXml namespace problem (Nullreferenceexception)

[ozane]

hi
i am sending request to server and receiving xml response from server. part of xml is as follows:

 <?xml version="1.0" encoding="UTF-8" ?> 
- <csw:Capabilities version="2.0.0" xmlns:csw="[URL unfurl="true"]http://www.opengis.net/cat/csw"[/URL] xmlns:dc="[URL unfurl="true"]http://purl.org/dc/elements/1.1/"[/URL] xmlns:xs="[URL unfurl="true"]http://www.w3.org/2001/XMLSchema"[/URL] xmlns:ogc="[URL unfurl="true"]http://www.opengis.net/ogc"[/URL] xmlns:req="[URL unfurl="true"]http://www.esri.com/metadata/http-request/"[/URL] xmlns:ows="[URL unfurl="true"]http://www.opengis.net/ows">[/URL]
- <ows:ServiceIdentification>
  <ows:ServiceType>CSW</ows:ServiceType> 
  <ows:ServiceTypeVersion>2.0.0</ows:ServiceTypeVersion> 
....

i want to populate the textboxes on my aspx page with the values from xml. for example i wantto extract the value of "ServiceType" element. but i am having exception when i want to get the values, i guess because of the namespace like csw and ows. how can i get the values? can i neglect the namespaces when i get the xml from server. sometimes other servers responsing xml with different namespace but the same structure... here is my part of my asp code.

 If xmlhttp.status = 200 Then
            Dim sonuc = xmlhttp.responseXML.xml

            Dim read As New System.Xml.XmlDataDocument
            read.LoadXml(sonuc)
            Dim node As System.Xml.XmlNode
            node = read.SelectSingleNode("Capabilities")
            TextBox1.Text = node.SelectSingleNode("ows:ServiceIdentification/ows:ServiceType").InnerText
            TextBox2.Text = node.SelectSingleNode("ows:ServiceTypeVersion").InnerText
        Else
....

any idea