reCaptcha >> 500 error

When requesting: http://www.google.com/recaptcha/api/challenge?k=6LdZYtoSAAAAADGqM_WZrWY3vL7ljLhZS8TiN4Ob&ajax=1&cachestop=0.7906857826747 We are getting the following error: An error occurred: An internal error occurred: 4EB77D70813C8.A3074C1.4C42 Thanks for any help you can provide. David -- 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.