I followed the <https://github.com/bcardarella/client_side_validations> instructions and the Railscast for it but still the labels vanishes and no errors show up in my standard 

```
  <% if @contactmail.errors.any? %>
  <div id="errorExplanation" class="contact-error">
    <ul>
    <% @contactmail.errors.full_messages.each do |msg| %>
      <li><%= msg %></li>
    <% end %>
    </ul>
  </div>
  <% end %> 

```

I use Rails 3.1 and Ruby 1.9.3