Put 4 Links In The Sidebar Of Master Page Which Every Other Form (content Page) In Web Application Inherits - C# / Visual Studio 2008

I want to have 4 links in the sidebar of master page which every other form (content page) in my web application inherits.

<table>
<tr>
<td width= "150px">
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
<asp:Menu runat="server" ID="MainMenu1" CssClass="MasterContent" StaticSubMenuIndent="30px">
<Items>
<asp:MenuItem Text="My Software" NavigateUrl="~/MySoftware.aspx"></asp:MenuItem>
<asp:MenuItem Text="Check Out" NavigateUrl="~/CheckOut.aspx"></asp:MenuItem>
<asp:MenuItem Text="View Shopping Cart" NavigateUrl="~/ShoppingCart.aspx"></asp:MenuItem>
<asp:MenuItem Text="Continue Shopping" NavigateUrl="~/Start.aspx"></asp:MenuItem>
</Items>
</asp:Menu>
</asp:ContentPlaceHolder>
</td>
<td width="900px">
<asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server">
</asp:ContentPlaceHolder>
</td>
</tr>
</table>

This is the content in the master page as you can see there are 4 menu items i tried to form as sidebar and i tried to inherit in home.aspx(one of the content pages) as follows:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Start.aspx.cs" Inherits="WebStore._Start"
MasterPageFile="~/Webstore.Master" %>
<asp:Content ID="StartSideBar" runat="server" ContentPlaceHolderID="ContentPlaceHolder1">

But unfortunately the sidebar is not at all getting displayed. I know i'm doing fundamentally wrong some where. My intention is to have web pages to have sidebar like this. It is a screenshot of my intended page.