title: Wordpress Contact form 7 add_filter() not working?
body: <p>Can't seem to use add_filter for Contact Form 7.
  Ultimately, I'm trying to use the code here to add custom validations: <a href="http://code-tricks.com/contact-form-7-custom-validation-in-wordpress/" rel="nofollow">http://code-tricks.com/contact-form-7-custom-validation-in-wordpress/</a></p>
  
  <p>But the add_filter calls don't seem to hook in where they are supposed to and nothing happens. Doing a simple ECHO test, I can see that the file is loading but no validation occurs.</p>
  
  <p>Any idea what might cause this?</p>
  
  <pre><code>add_filter('wpcf7_validate_text','cf7_custom_form_validation', 10, 2); // text field
  add_filter('wpcf7_validate_text*', 'cf7_custom_form_validation', 10, 2); // Req. text field
  </code></pre>
  
  <p>any specified cf7_custom_form_validation() function simply does nothing when form submitted. Even if I just have it echo some text or manipulate a variable. Nothing happens. The function doesnt' seem to get called.</p>