Try the color captcha.
Some servers do not like the black and white captcha so I created the color one.
That setting did not work for me unfortunately. Still broken image
I took a look at the site and for some reason your web server doesn’t not allow the katb_captcha_color.php file to load, giving an invalid url from the following line:
<img alt="Verification Captcha" src="http://www.foxvalleymutual.com/wp-content/plugins/testimonial-basics/includes/katb_captcha_color.php">
Also when I click the link in the source code I am getting warnings about the php session_start() function which is required for the captcha to work. When I click on the link where the captcha is working the image will come up.
So it appears that your web server is not allowing session variables.
When I Google the session variable warning messages, the solution seems to be to call the service provider for help.
I do know that either the black and white or the color captcha works on most sites.
Hope this helps
