reCaptcha was'nt entered correctly message

Hi, I am adding reCaptcha validation to my contact form and i'm getting error message everytime i try to solve it. I can't fix it, please help. my personal website http://bit.ly/1kEqHba . -- 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.