Update Panel Issue

In master page i have

Code:

---

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
 <ContentTemplate>
      <asp:Label ID="Label2" runat="server" style="font-size: 12px; font-family: Tahoma; color: #4102FF"></asp:Label>
      <asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick"></asp:Timer>

  </ContentTemplate>
</asp:UpdatePanel>

---

and above code are used for Updating time which look something like this

http://i.imgur.com/aF2cF.png

.....

Now I added one webpage and selected above master page

Now I have one country and state dropdown box

country = autopostback true and selectedindex change event

(once i will select country .. request will be sent to server and state will be added into the state dropdown box)

-----

The problem is that when i scroll items into country dropdownlist .. dropdown selectedIndex event fired automatically (I guess the problem is with the timercontrol (into masterpage) which fires after every 1 second)

Please Suggest me how i can correct this problem

Thanks

Post the code on the Child Page