after the form is created using Form builder, you will not be able to edit the email function through the form builder wizard
to edit the email functions open the server behaviors list:
Window -> Server Behaviors
in the server behaviors list, double click the universal email server behavior to edit it.
the simplest way to get the form information in the email is to check the option to create a file for the email, this creates a file from a template that will loop through the form and send the form information.
if you do not select this option, you need to click the edit button to use Dreamweaver to design the email body.
if you continue to have problems, send a copy of your form page and the webassist/email directory in a zip file.