Thanks for the prompt response. If I drop down the forms list I can see all the form fields listed which includes an item listed as Security_Code_1. In addition there are three entries hdwemail - hdwok and hdwnook which are a part of the php form script. I have attached a couple of screenshots of the top part of this list I have also attached the code for the php page. As you will see from the screenshots I am not seeing the server variables element.
In case it helps the form uses Form2mail to process the submission.
Hope this provides all the info you need.