title: Unable to find field "Name" (Capybara::ElementNotFound)
body: <p>I'm trying to use capybara+rspec and get this error: Unable to find field "Name" (Capybara::ElementNotFound)</p>
  
  <p>Here is my form:</p>
  
  <pre><code>%h2 Sign up
  = simple_form_for(resource, :as =&gt; resource_name, :url =&gt; registration_path(resource_name), :html =&gt; {:class =&gt; 'form-vertical' }) do |f|
    = f.error_notification
    = display_base_errors resource
    = f.input :name, :autofocus =&gt; true
    = f.button :submit, 'Sign up', :class =&gt; 'btn-primary'
  = render "devise/shared/links"
  </code></pre>
  
  <p>Here is my user_steps.rb</p>
  
  <pre><code>When /^I sign up with valid user data$/ do
    create_visitor
    sign_up
  end
  
  def create_visitor
    @visitor ||= { :name =&gt; "Test visitor"}
  end
  
  def sign_up
    visit '/users/sign_up'
    fill_in "Name", :with =&gt; @visitor[:name]
    click_button "Sign up"
  end
  </code></pre>
  
  <p>What's wrong????</p>