Please disregard my question above. This appears to be a common issue with this plugin.
After wasting several hours trying to resolve the issue w/ Really Simple CATCHA cited in the earlier posts, I decided to find an alternative plugin. I went with Fast Secure Form – it was easy to install, worked correctly, and was easy to tailor.
While I like Contact Form 7, the integration of a CAPTCHA tool needs some significant work.
Takayuki,
I am having the exact same problem. I have been assured by my hosting company (GoDaddy) that we are using the latest version of PHP.
http://clear-gauge.com/contact-us/
Any other thoughts on how to resolve this?
Thanks,
Andrew