update panel not work with form view

Question

Hi all, I wrap form view in update panel. And set this property:

    <asp:UpdatePanel Updatemode="Always" ID="UpdatePanel1" runat="server">
    <contenttemplate>
      <asp:FormView id="frmData" runat="server">
      </asp:FormView>
   </contenttemplate>
    </asp:UpdatePanel>

but very strange thing is happens. For example, Form view is in edit mode and when I click on update button, all stuff in code behind is executed but form view is not closed, and user not see as if nothing had happened. Also i have event who has fired when update is finished.

I still straggle with this any help...