Detail view is not visible

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C#

Hi

I am using Detail view to insert details to the database.
First time i am using detail view,while running Detail view control is not visible.
Could you please help where i am going wrong.

<tag>
 <asp:DetailsView ID="DetailsView1" runat="Server" CellPadding="4" 
                    ForeColor="#333333" GridLines="None"
     Width="100%" DataSourceID="SqlDataSource1" AllowPaging="False" AutoGenerateRows="False" DataKeyNames="DoNo"
     AutoGenerateDeleteButton="True" AutoGenerateEditButton="True" 
                    AutoGenerateInsertButton="True" DefaultMode="Edit" Visible="True" >
        <footerstyle backcolor="#5D7B9D" font-bold="True" forecolor="White" />
        <commandrowstyle backcolor="#E2DED6" font-bold="True" />
        <editrowstyle backcolor="#999999" />
        <rowstyle backcolor="#F7F6F3" forecolor="#333333" />
        <pagerstyle backcolor="#284775" forecolor="White" horizontalalign="Center" />
        <fieldheaderstyle backcolor="#E9ECF1" font-bold="True" />
        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
        <alternatingrowstyle backcolor="White" forecolor="#284775" />
        <fields>
            <asp:TemplateField HeaderText="DoNo">
                <itemtemplate>
                    <%# Eval("DoNo") %>
                </itemtemplate>
            
            <asp:BoundField DataField="CompanyName" HeaderText="Company" />
            <asp:BoundField DataField="CompanyAddress" HeaderText="Address" />
            <asp:BoundField DataField="Tel" HeaderText="Tel" />
            <asp:BoundField DataField="Fax" HeaderText="Fax" />
            <asp:BoundField DataField="ContactPerson" HeaderText="Contact" />
            <asp:BoundField DataField="SalesPerson" HeaderText="SalesPerson" />    
        </fields>
    
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString='Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database2.mdf;Integrated Security=True;User Instance=True'
     SelectCommand="Select * FROM DeliveryOrder ORDER BY [DoNo]"
     DeleteCommand="Delete FROM DeliveryOrder WHERE DoNo= @DoNo"
     UpdateCommand="UPDATE DeliveryOrder SET CompanyName = @CompanyName, CompanyAddress = @CompanyAddress, Tel = @Tel, Fax = @Fax, ContactPerson=@ContactPerson, SalesPerson=@SalesPerson WHERE DoNo = @DoNo"     
                    InsertCommand="INSERT INTO SampleForTutorials (CompanyName, CompanyAddress,Tel,Fax,ContactPerson,SalesPerson) VALUES (@CompanyName, @CompanyAddress,@Tel,@Fax,@ContactPerson,@SalesPerson)" 
                    ProviderName="System.Data.SqlClient">
        <deleteparameters>
            <asp:Parameter Name="DoNo" />
        </deleteparameters>
        <updateparameters>
            <asp:Parameter Name="DoNo" Type="Int32" />
            <asp:Parameter Name="CompanyName" Type="string" Size="50" />
            <asp:Parameter Name="CompanyAddress" Type="string" Size="200" />
            <asp:Parameter Name="Tel"  Type="Int32" />
            <asp:Parameter Name="Fax" Type="Int32" />
           <asp:Parameter Name="ContactPerson" Type="string" Size="20" />
           <asp:Parameter Name="SalesPerson" Type="string" Size="20" />
        </updateparameters>
        <insertparameters>
            <asp:Parameter Name="CompanyName" Type="string" Size="50" />
            <asp:Parameter Name="CompanyAddress" Type="string" Size="200" />
           <asp:Parameter Name="Tel"  Type="Int32" />
            <asp:Parameter Name="Fax" Type="Int32" />
           <asp:Parameter Name="ContactPerson" Type="string" Size="20" />
           <asp:Parameter Name="SalesPerson" Type="string" Size="20" />
        </insertparameters>
      
</tag>

Thanks.

Regards
Lancy