The form works fine if I always put in the correct numbers in the Type the numbers field.
But, the number field doesn’t reset after an incorrect number is input, the Reset button does not clear the form, and initial input in the text field where the numbers go does not appear after text is entered under the Field > Options > Save.
Also, once the incorrect number loop is entered, if I click the Go Back to the Form text, I get the form back, all filled out, and type nothing in the number field, and the form sends the email with the number field blank, which means no effective captcha.
I worked for an hour with settings and trying to edit fixed fields, but ran out of time and gave up. I have seen this form working fine, for example at ashmug.com. My form is at http://www.so-yum.com/custom-contact-form.
I'd love to help, but I am just learning PHP. I'm hoping someone has a fix.