LoginView and Click server side event

[senglory]

                                    <asp:LoginView ID="LoginStatus1" runat="server" OnViewChanging="LoginView1_ViewChanging">
                                        <LoggedInTemplate>
                                            <asp:LoginName ID="LoginName1" runat="server" FormatString="You login as {0}" />
                                            <asp:Button ID="btnLogout" runat="server" Text="Logout" CssClass="style221" Width="70" OnClick="btnLogout_Click"/>
                                            <br />
                                        </LoggedInTemplate>
                                    </asp:LoginView>

Why do I never come to btnLogout_Click() if I click on "Logout" button?