synthtony on "Contact Form 7 : captcha problem..."

I'm stumped. I recreated your form as all the code looks good and it seems to work fine for me even with the quiz initiated.
Please try here: http://idg-partners.com/form-test/
Does the form work ok without CAPTCHA?
Have you configured your mailto?
You might check this string to see if it applies: http://wordpress.org/support/topic/plugin-really-simple-captcha-code-image-does-now-show?replies=11