adding records to multiple tables in MSDE 2000 from XML using ADO.NET

I am using .NET web aplication and MSDE 2000. I receive new record in
XML format which I want to add into MSDE 2000. I am doing it as below.

Private Sub InsertNew(ByVal sData1 As String)
Dim SR1 As System.IO.StringReader = New
System.IO.StringReader(sData1)

DS1.ReadXml(SR1)
SqlDataAdapter1.Update(DS1)

End Sub

This works fine with one table.

But say, I receive following XML data:
<ORDER>
<COMPANY>DIXON</COMPANY>