Please, Please help, this is really driving me crazy

I am trying to read the contents of an XML file, filter the results with XMLNodeReader & XPath and then save them to a DataSet ready for binding in my page.

The problem is that I can only seem to return one result using SelectSingleNode, as SelectNodes creates an XMLNodeList which XMLNodeReader doesn't like.

I get 'XMLNodeList cannot be converted to XMLNode'

Can anyone help, even if its a work around to get my filtered data into a DataSet. Thanks in Advance.

Here's the code.

        Dim docReader As New XmlDocument
        docReader.Load(Server.MapPath("myFile.xml"))

        Dim nodeList As XmlNodeReader = New XmlNodeReader_
            (docReader.DocumentElement.SelectNodes("channel/item"))

        Dim docDataSet As New DataSet
        docDataSet.ReadXml(nodeList)


        RSSXMLDataList.DataSource = docDataSet.Tables(0).DefaultView
        RSSXMLDataList.DataBind()

I got around this by setting the XML to a dataset and then the dataset to a dataview where i could sort, filter and all the rest of it.

        Dim ds As DataSet = New DataSet
        ds.ReadXml(Server.MapPath("myFile.xml"))
        Dim view As DataView

        view = ds.Tables("item").DefaultView
        view.RowFilter = "category = 'True'"
        If view.Count = 0 Then
            rssPanel.Visible = True
        Else
            RSSXMLDataList.DataSource = view
            RSSXMLDataList.DataBind()
        End If
        view.Dispose()