CAPTCHA broken on subdomain

This is for a mobile website form page (using separate subdomain) which has links to webassist files on the parent website. I had to rework some relative paths to the linked webassist files for this form. It all seems to be working except the CAPTCHA code verification is broken. A CAPTCHA image displays, but the code doesn't validate. I made sure it was "Security_Code" and not "Security_Code_1" after updating the look of the CAPTCHA. Since the main site form was working, I'm sure in the translation to mobile subdomain I have overlooked/broken a server function.

Main website:
request_an_appointment.php

Broken mobile CAPTCHA:
request_an_appointment.php

Full page code attached

The code looks correct.

I have created a support ticket so we can look into this issue further.

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If anyone else is experiencing this same issue, please append to this thread.

Update: We had to duplicate the captcha folder itself in the main mobile folder, update links and let it run from there. Which is great.

Jason! Thank you! I thought about trying this, but wasn't sure what to change. Now that I see what you have done I'm going to fix their mobile Contact Us form, too.

This is the VERY REASON I stick with you guys and will continue to purchase extensions. The ongoing support is unparalleled and priceless!