cannot find column on dataset from XML vb.net

Sub insert()
      Dim ds As New DataSet
      Dim xmlFile As XmlReader
      Dim sql As String

      Dim id As String
      Dim company As String
      Dim datecom As Date
      Dim time As String
      Dim place As String
      Dim address As String
      Dim type As String
      Dim hidden As String

      xmlFile = XmlReader.Create("../../XML/datacoba.xml", New XmlReaderSettings())
      ds.ReadXml(xmlFile)
      Dim i As Integer
      dtkoneksi.Open()
      For i = 0 To ds.Tables(0).Rows.Count - 1
          id = ds.Tables(0).Rows(i).Item(0)
          '<on this line will be shown error "cannot find column 1" >
          company = ds.Tables(0).Rows(i).Item(1)
          '</>
          datecom = (ds.Tables(0).Rows(i).Item(2))
          time = (ds.Tables(0).Rows(i).Item(3))
          place = ds.Tables(0).Rows(i).Item(4)
          address = ds.Tables(0).Rows(i).Item(5)
          type = ds.Tables(0).Rows(i).Item(6)
          hidden = ds.Tables(0).Rows(i).Item(7)
          sql = "insert into seminar_insert values(" & id & ",'" & company & "'," & datecom & "," & time & "," & place & "," & address & "," & type & "," & hidden & ")"
          'Command = New SqlCommand(sql, connection)
          cmd.CommandType = CommandType.Text
          cmd.ExecuteNonQuery()
      Next
      dtkoneksi.Close()
  End Sub

<?xml version="1.0" encoding="utf-8"?>
<!--XML Files datakonsumen-->
<dataset>
    <seminar_schedule>
        <!--Start record-->
        <id>9</id>
        <company>PT rubungjaya</company>
        <date>23/05/2013</date>
        <time>01:20:00</time>
        <place>dasdas</place>
        <address>dasdas</address>
        <type>Company</type>
        <hidden>1</hidden>
        <id>13</id>
        <company>Individu</company>
        <date>14/05/2013</date>
        <time>07:23:00</time>
        <place>bandung</place>
        <address>sadasdsad</address>
        <type>Individu</type>
        <hidden>1</hidden>
        <id>14</id>
        <company>Pemkab malang</company>
        <date>21/05/2013</date>
        <time>08:12:00</time>
        <place>Gedung graha cakra</place>
        <address>Jl melati, Malang</address>
        <type>Government</type>
        <hidden>1</hidden>
        <id>15</id>
        <company>pemkot</company>
        <date>21/05/2013</date>
        <time>19:18:47</time>
        <place>hel</place>
        <address>asdasdas</address>
        <type>Government</type>
        <hidden>1</hidden>
        <id>17</id>
        <company>PT alca</company>
        <date>30/05/2013</date>
        <time>20:06:18</time>
        <place>heoeh</place>
        <address>alcaccccccc</address>
        <type>Company</type>
        <hidden>1</hidden>
        <id />
        <company />
        <date />
    </seminar_schedule>
</dataset>