button event

Question

hi

         <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">

                <ContentTemplate>

                    <asp:Button ID="btncontact" runat="server" Text="Contact" UseSubmitBehavior="false"

                        OnClick="btncontact_Click" CausesValidation="false" />

                    <asp:Button ID="btnworkinghours" runat="server" Text="Working Hours" UseSubmitBehavior="false"

                        OnClick="btnworkinghours_Click" CausesValidation="false" />

                    <asp:Button ID="Button3" runat="server" Text="Yes" Style="display: none;" />

                    <asp:Button ID="Button4" runat="server" Text="No" Style="display: none;" />

                    <asp:Button ID="btnmap" runat="server" Text="Map" UseSubmitBehavior="false" OnClick="btnmap_Click"

                        CausesValidation="false" />

                </ContentTemplate>

                <Triggers>

                    <asp:AsyncPostBackTrigger ControlID="btncontact" EventName="Click" />

                    <asp:AsyncPostBackTrigger ControlID="btnworkinghours" EventName="Click" />

                    <asp:AsyncPostBackTrigger ControlID="btnmap" EventName="Click" />

                </Triggers>

            </asp:UpdatePanel>

when i'm using this code the button events are not fired 

please help me

it's important to me