button event are not working ?PLZ do help

Question

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<asp:UpdatePanel ID="up" runat="server">

<Triggers>

<asp:PostBackTrigger ControlID="btnsubmit"/>

</Triggers>

<ContentTemplate>

 

 

<asp:panel ID="mypanel" runat="server">

<asp:Button ID="btnsubmit" runat="server" Text="Submit" Width="150px"

class="btn-submit" onclick="btnsubmit_Click"/>

&nbsp;&nbsp;&nbsp;

<asp:Button ID="btnexit" runat="server" Text="Exit" class="btn-reset"

Width="150px" onclick="btnexit_Click1" /> </asp:panel>

 

</ContentTemplate>

</asp:UpdatePanel>

 

when I am using click on above submit button its event are not firing(working).I have used it in ajax ctrl and without ajax ctrls ?still it is not working 

So anyone can help into resolve dis issues