[Solved]Security error on php form post

[janaf]

I have a technical database that I am trying to integrate into my 4.0.6 site, using php gadget and php direct eval code. I am new at PHP and fairly new at vB.... I Created a php widget. It has a html form with a post button, targeting the same page

<form action="" method="POST">

The form has some drop-down selections and a submit button.
When hitting the submit button button, I get:

Your submission could not be processed because a security token was missing

Any ideas how to solve this?