We have the form behind a Password protected area for users, but when the users submit the form, they are Logged out and sent back to the log in screen. The form is completed, but the user is pushed out.

I've tried looking through the code to find what would cause the session end, but no luck so far.

In the settings section under confirm options you put in what you want to happen after they submit the form. The middle selection may be what you're looking for. You put a link to where you want them to go after they submit the form.

Web form builder relies on $_SESSION's for data to get displayed back to you. It unsets those $_SESSION's after submission. Make sure you don't have any variables named the same on your form as you do in your login script.