reCaptcha need help with asp.net

Im trying to get it to work on asp.net but it doesnt give anything via post nor get method. Could please someone post the code or a hint how they got it to work? -- 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.