Sto facendo degli esercizi ma non capisco perchè il seguente codice, quando lo mando in esecuzione nel browser non effettua il rendering!Compare una pagina bianca senza nessun messaggio!Comemai?Salto qualcosa?

codice:
<%@ Page Language="VB" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.OleDb" %>
<script runat="server">

    Sub Page_Load(obj as object, e as eventargs)
    Dim objConn as new OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;" & _
    "Data Source=c:\Dev\Data\Banking.mdb")
    Dim myCommand as new OleDbDataAdapter("SELECT * FROM tblUsers", objConn)
    Dim ds as DataSet = new DataSet()
    myCommand.Fill(ds, "tblUsers")
    DataGrid1.DataSource = ds.Tables("tblUsers").DefaultView
    DataGrid1.DataBind()
    End Sub
    
    Sub DataGrid1_Edit(obj as object, e as DataGridCommandEventArgs)
    DataGrid1.EditItemIndex = e.Item.ItemIndex
    DataGrid1.DataBind()
    End Sub
    
    Sub DataGrid1_Update(obj as object, e as DataGridCommandEventArgs)
    DataGrid1.DataBind()
    End Sub
    
    Sub Datagrid1_Cancel(obj as object, e as DataGridCommandEventArgs)
    DataGrid1.EditItemIndex = -1
    DataGrid1.DataBind()

</script>
<html>
<head>
</head>
<body>
    <form runat="server">
        <asp:DataGrid id="DataGrid1" runat="server" GridLines="Vertical" CellPadding="3" BackColor="White" BorderColor="#999999" BorderWidth="1px" BorderStyle="Solid" ForeColor="Black" AutoGenerateColumns="False">
            <FooterStyle backcolor="#CCCCCC"></FooterStyle>
            <HeaderStyle font-bold="True" forecolor="White" backcolor="Black"></HeaderStyle>
            <PagerStyle horizontalalign="Center" forecolor="Black" backcolor="#999999"></PagerStyle>
            <SelectedItemStyle font-bold="True" forecolor="White" backcolor="#000099"></SelectedItemStyle>
            <AlternatingItemStyle backcolor="#CCCCCC"></AlternatingItemStyle>
            <Columns>
                <asp:BoundColumn DataField="UserID" HeaderText="ID"></asp:BoundColumn>
                <asp:BoundColumn DataField="FirstName" HeaderText="Nome"></asp:BoundColumn>
                <asp:BoundColumn DataField="LastName" HeaderText="Cognome"></asp:BoundColumn>
                <asp:EditCommandColumn ButtonType="LinkButton" UpdateText="Update" HeaderText="Edit" CancelText="Cancel" EditText="Edit"></asp:EditCommandColumn>
            </Columns>
        </asp:DataGrid>
        
    </form>
</body>
</html>