title: ASP Required Field Validator shows asterisk instead of Error Message
body: <p>I've done some searching around and seem to be the only one with this sort of issue. I have a few asp:RequiredFieldValidator on my form and basically what happens is that when the validation is tripped, only a red asterisk shows up and not my error message.</p>
  
  <p>Here is the validator:<br />
  <code>&lt;asp:RequiredFieldValidator runat="server" CssClass="label label-danger"
  ControlToValidate="email" ErrorMessage="Please provide an email address."
  Display="Dynamic" SetFocusOnError="true" Text="Please provide an email address." /&gt;</code></p>
  
  <p>And here is the control being validated:<br />
  <code>&lt;asp:TextBox runat="server" CssClass="form-control" ID="email" placeholder="First.Last" ClientIDMode="Static" TabIndex="1"&gt;&lt;/asp:TextBox&gt;&lt;span class="input-group-addon"&gt;@ourdomain.com&lt;/span&gt;</code></p>
  
  <p>All of this is inside a master page and an update panel.</p>