title: DropDown not firing OnSelectedIndexChanged
body: <p>I have a page with dropdown list</p>
  
  <pre><code>   &lt;asp:Content runat="server" ContentPlaceHolderID="ContentPlaceHolder1"&gt;
    &lt;asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"&gt;
      &lt;asp:ListItem&gt;Cellsite&lt;/asp:ListItem&gt;
      &lt;asp:ListItem&gt;Agreement&lt;/asp:ListItem&gt;
      &lt;asp:ListItem&gt;Event&lt;/asp:ListItem&gt;
      &lt;asp:ListItem&gt;User&lt;/asp:ListItem&gt;
  &lt;/asp:DropDownList&gt;
  &lt;asp:Label runat="server" ID="EntityName"&gt;&lt;/asp:Label&gt;
  &lt;ig:WebScriptManager ID="WebScriptManager1" runat="server"&gt;&lt;/ig:WebScriptManager&gt;
  &lt;ig:WebDataGrid ID="EntityGrid" runat="server"  Width="100%"&gt;
      &lt;Behaviors&gt;
          &lt;ig:Sorting&gt;
          &lt;/ig:Sorting&gt;
      &lt;/Behaviors&gt;
  &lt;/ig:WebDataGrid&gt;
  </code></pre>
  
  <p></p>
  
  <p>code behind is</p>
  
  <pre><code>     protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
      {
          EntityName.Text = DropDownList1.SelectedItem.Text;
      }
  </code></pre>
  
  <p>For somereason the label is never updated the event selectedindexchanged is not firing at all I need to add a dynamic grid in this event. Any clue?</p>