title: Validation Summary MessageBox not displaying
body: <p>I'm trying to display my Validation Summary in a MessageBox and it simply inst working. Here's what I have. </p>
  
  <pre><code>&lt;asp:ValidationSummary ID="ValidationSummary1" runat="server" Height="24px" Width="100%"ShowMessageBox="True" ShowSummary="False"&gt;&lt;/asp:ValidationSummary&gt;
  
  &lt;tr&gt;
    &lt;td align="right"&gt;
      &lt;asp:Label ID="Label2" runat="server" CssClass="label" Width="138px"&gt;* Serial Number&lt;/asp:Label&gt;
   &lt;/td&gt;
   &lt;td&gt;
     &lt;asp:TextBox ID="txtSerial" runat="server" &gt;&lt;/asp:TextBox&gt;
     &lt;asp:RequiredFieldValidator ID="valSerial" runat="server"
       ControlToValidate="txtSerial" ErrorMessage="Serial number is required" &gt;*&lt;/asp:RequiredFieldValidator&gt;
   &lt;/td&gt;
  </code></pre>
  
  <p></p>
  
  <pre><code>&lt;asp:Button ID="btnSubmit" runat="server" Text="Submit" Height="20px"&gt;&lt;/asp:Button&gt;
  </code></pre>
  
  <p>I have followed every guide I can find on the internet but i can't get it to work.
  What am i missing? Thanks!</p>