""Could not open socket""

The reCAPTCHA always appear ""Could not open socket"" no matter I enter the correct or incorrect code. Can anyone give a recaptchalib.php file so that I can check which part I am wrong. But don't give me the link of the recaptchalib example. If someboy can give that file to me please email to p.khwong08@gmail.com. Thank you ! -- 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://groups.google.com/group/recaptcha. For more options, visit https://groups.google.com/groups/opt_out.