title: Custom Validator not firing
body: <p>I realize there are lots of similar posts, however I have not found one that has worked for me unfortunately.  Basically, I have an asp:customvalidator that I am trying to add to a validationgroup with other validators so that all error messages appear in the same alert.  Here is the customvalidator</p>
  
  <pre><code>&lt;asp:TextBox runat="server" ID="txtVideo1Url"  Columns="20" Width="98%" /&gt;
  &lt;asp:CustomValidator runat="server" ID="valURL1" ControlToValidate="txtVideo1Url" OnServerValidate="txtVideo1Url_ServerValidate" Display="None" ValidationGroup="submission" /&gt;
  </code></pre>
  
  <p>and here is the event</p>
  
  <pre><code>    protected void txtVideo1Url_ServerValidate(object sender, ServerValidateEventArgs e)
      {
          e.IsValid = false;
          valURL1.Text = "FAIL!";
      }
  </code></pre>
  
  <p>The event isn't firing at all and I have no idea why.  Once I can get the event firing I can put some actual logic into it, lol</p>
  
  <p>UPDATE: I've noticed that I am now able to get the event firing, however the validationsummary is set to display all errors in a messagebox and this error isn't getting added to the messagebox.</p>