Why the Login status control doesn't work?

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C#

ASP.NET

C#3.5

Hello everybody, I am doing a simple project and I just use the Login and LoginStatus contrl,but the LoginStatus doesn't work and it does nothing when I click on the Logout button.

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" Runat="Server">
    Welcome: <asp:LoginName ID="LoginName1" runat="server">
    </asp:LoginName>
    <br />
    <asp:Login ID="Login1" runat="server">
    </asp:Login>
    <br />
    <asp:LoginStatus ID="LoginStatus1" runat="server" />
</asp:Content>