Form is sent without activating recapcha

Form is sent without activating recapcha this deveria not be so really do not quite understand its operation and did everything that stands in the documentation but I get no results http://bit.ly/1xRRirl -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.