XML Schema Relations

Hello all.. I have an XML document, created the XML Schema (XSD), then added some Keys and a relation to the schema.. When I open up the XML file, the relation is not there. It seems like its not reading the schema file.. here is my code:

VB Code:

Public Sub LoadFromXML(ByVal strXMLFile As String)
 
        Dim nodElement As New TreeNode()   'Create a Generic Element Node
        Dim nodParent As New TreeNode()    'Create a Generic Parent Node
 
        ' Create and Open DataSet from XML
        Dim dsXMLNames As New DataSet("DotNetSend")
        dsXMLNames.ReadXml(strXMLFile)
 
        With dsXMLNames.Tables("Groups")
 
            Dim r As DataRow                                    'Create Generic DataRow 
 
            'Loop through all Rows in Group table
            For Each r In .Rows
                nodParent = New TreeNode()
                nodParent.Text = r("Name").ToString()
                'nodParent.Expand()
 
                Dim c As DataRow                                'Create Generic DataRow
 
                'Loop through all child rows of parent
                For Each c In r.GetChildRows("GroupsUsers")
                    nodElement = New TreeNode()
 
                    'Set Node Properties
                    With nodElement
                        .Checked = c("Selected").ToString()
                        .Tag = c("Name").ToString()
                        .Text = c("Description").ToString()
                    End With
 
                    'Add Child node to Parent
                    nodParent.Nodes.Add(nodElement)
                    nodElement = Nothing
                Next c
 
                'Add Parent to Treeview
                tvUsers.Nodes.Add(nodParent)
                nodParent = Nothing
            Next r
 
        End With
 
    End Sub

How am I supposed to link the xml file to the schema? Also, can I put the schema inline inside the .xml file? Lastly, why doesnt this work!?!?!

-mcd