Captcha is not working

Hi there,

i did implement the Captcha with the key and secret from Google but it’s not showing in the contact form:

the code in the form is:

<div class="row">
  <div class="col-xs-12 col-sm-12 col-md-4">
    [text* your-name class:form-field placeholder "Name*"]
  </div>
  <div class="col-xs-12 col-sm-12 col-md-4">
    [email* email class:form-field placeholder "E-Mail Adresse*"]
  </div>
  <div class="col-xs-12 col-sm-12 col-md-4">
    [tel* phone-number class:form-field placeholder "Telefonnummer*"]
  </div>
  </div>
  <div class="row">
     <div class="col-xs-12">
     [textarea* your-message class:form-textarea placeholder "Ihre Nachricht"]
     </div>
</div>
<div class="row">

<div class="col-xs-12 col-sm-6 col-md-4">
[recaptcha]
   [submit class:btn-submit "NACHRICHT SENDEN"]
</div>
</div>

Wordpress is Latest Version
And the Plugin Too

any Ideas?

The page I need help with: [log in to see the link]