Forms not recogniing the correct directory for mail.php

Ok, I have bought templates membership and a whole bunch of stuff from you guys but I have a major problem on a couple of my free templates catach box and iribbion. if you go to http://www.rehabilitation-solutions.com theres a contact us now widget form on the right that when someone only on the home page fills it out it works just fine. However, if they're viewing another part of the site like about us http://www.rehabilitation-solutions.com/about-us/ when the user types in the information it calls up http://www.rehabilitationsolutions.com/about-us/mail.php, which is in the root html directory so i get a 404 error does anyone know how to fix it so it calls upon rehabilitation-solutions.com contact form on the sidebar of my widgets it calls up rehabilitation-solutions.com/mail.php. I lost a lot of leads because of this and it cost me a lot of money if anyone can help, I'd be very grateful.

Thank you
Grateful Member
Beau Griffis