I don't understand what's going on with this component. I installed it, made the changes as directed but it seems to make no difference to my contact form whatsoever, other than to put a pretty but non-functioning captcha form at the bottom of it. My form only allows you to submit when all fields are filled in, including the captcha form input. However with the rest of the form filled in it makes no difference if you put in an incorrect version of the captcha image or even just 1 letter or number - the form submits regardless and says 'Thank you for your email'. Seems that the captcha is entirely superfluous and dosn't do what it's supposed to. Maybe I'm missing something but there's no trobleshooting guide for this problem and the author's website no longer exists.