Help with eror recaptcha

hello sir, i have buy your vfb pro…
recently after i upgrade wp 4.1 my form become eror. and it says eror with recaptcha things..
now i set back to standar captcha default and back to normal again, unfortunately it looks less profesional than before…
so please give me some clue to get recaptcha works again in my vfb pro..
thanks advance..
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