title: problem with dropdownlist updateprogress and updatepanel
body: <p>The updateprogress doesnt show the gif. If the dropdownlist is inside updatepanel without trigger, it works. Any idea?</p>
  
  <pre><code>    &lt;asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" onselectedindexchanged="DropDownList1_SelectedIndexChanged"&gt;
      &lt;/asp:DropDownList&gt;
      &lt;asp:UpdateProgress ID="UpdateProgress1" AssociatedUpdatePanelID="UpdatePanel1" runat="server" DisplayAfter="0"&gt;
          &lt;ProgressTemplate&gt;
              &lt;div id="IMGDIV" align="center" valign="middle" runat="server" style="position: absolute;left: 52%;top: 61%;visibility:visible;vertical-align:middle; background-color:Transparent"&gt;
                  &lt;img src="../App_Themes/Default/images/27-1.gif" /&gt;
              &lt;/div&gt;
          &lt;/ProgressTemplate&gt;            
      &lt;/asp:UpdateProgress&gt;
      &lt;asp:UpdatePanel ID="UpdatePanel1" runat="server"&gt;
          &lt;ContentTemplate&gt;
              &lt;cc1:Chartlet ID="Chartlet1" runat="server" /&gt;
          &lt;/ContentTemplate&gt;
          &lt;Triggers&gt;
              &lt;asp:AsyncPostBackTrigger ControlID="DropDownList1" EventName="selectedindexchanged" /&gt;
          &lt;/Triggers&gt;
      &lt;/asp:UpdatePanel&gt;
  </code></pre>