FormEngine from 2DMonkey

Hi,
I am using the form builder from 2DMonkey (FormEngine) and I have emailed them 3 times and have had on response to date.
Has WordPress got a form dedicated to FormEngine?, if not then someone that is using the plugin may be able to help.
Where the Submit button is I have a white border that runs the width of the page, there has to be a CSS command that will eliminate this problem? I have tried a few rules myself with no success, any help would be greatly appreciated.

http://bigsplash.aussiedigitalgraphics.com/school-group-booking-enquiry-form/