title: Radio Button Check Changed even not firing
body: <p>I've 2 radio buttons in a user control and control is registered to the page. When i click on the radio button, the event(CheckChanged) is not firing. </p>
  
  <pre><code>&lt;asp:View ID="viewfirst" runat="server"&gt;
                      &lt;asp:UpdatePanel ID="updatepanel1" runat="server" UpdateMode="Always"&gt;
                          &lt;ContentTemplate&gt;
  
                              &lt;asp:RadioButton ID="radio1" Text="Yes" Enabled="true" runat="server" /&gt;
                              &lt;asp:RadioButton ID="radio2" Text="No" Enabled="true" runat="server" /&gt;
                          &lt;/ContentTemplate&gt;
                      &lt;/asp:UpdatePanel&gt;
                  &lt;/asp:View&gt;
  
  Below is code in behind file of the control. 
  
  
   Protected Sub radio1_CheckedChanged(sender As Object, e As EventArgs) Handles radio1.CheckedChanged
      //
      //
  End Sub
  </code></pre>
  
  <p>It seems everything looks good, but something is wrong. Can you please let me know.</p>