How to show only the contact form on a Uservoice widget?

Question

I'm using the Uservoice JS widget API to display only the contact form, but it always reverts to showing the 'Post an idea' (smartvote) form. Here's what I've configured:

UserVoice.push(['set', {
  accent_color: '#000000',
  trigger_color: 'white',
  trigger_background_color: '#c9000b',
  contact_enabled: true,
  smartvote_enabled: false,
  post_suggestion_enabled: false
}]);

// Add default trigger to the bottom-right corner of the window:
UserVoice.push(['addTrigger', {
  trigger_position: 'top-right',
  trigger_style: 'tab',
  mode: 'contact'
}]);

Any ideas?