If I am reading this correctly, when the form post it is getting a new captcha image.
array(15) { ["Contact_Name"]=> string(5) "Bryan" ["addblock"]=> string(0) "" ["Email_address"]=> string(28) "bryan@xxx.com" ["seconddblock"]=> string(0) "" ["Phone"]=> string(0) "" ["preferred"]=> string(10) "Choose one" ["Mailing_Address"]=> string(0) "" ["City"]=> string(0) "" ["State"]=> string(0) "" ["Zip"]=> string(0) "" ["Hear"]=> string(0) "" ["Comments"]=> string(14) "test webassist" ["Security_code"]=> string(5) "h6MzN" ["Security_imagebutton_x"]=> string(2) "59" ["Security_imagebutton_y"]=> string(2) "13" } array(2) { ["captcha_1"]=> &string(5) "999ZK" ["WAVT_contact_Errors"]=> string(0) "" } ,4