Update panel doesn't update using timer

Hi,
I want to update the texts in textBoxes in UpdatePAnel using timer, but the text boxes do not update, nothing happens after 5sec, as I set the timer. I want on click on Button 3 the timer to start updating the panel, i.e. the text in the textboxes every 5 seconds. Every 5 seconds the timer should perform as if the button 2 were pressed. The button2 updates the textboxes in the same updatepanel on click event performing some calculations and displaying the reslts in textboxes.
Here is my code
the aspx <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <Triggers> <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" /> </Triggers> <ContentTemplate> <asp:Label ID="Label14" runat="server" Font-Names="Aharoni" ForeColor="#003366&qu ...