I'm trying to install a newsletter sign-up form from AWeber on a WordPress site. There seems to be a conflict between the form code and the theme code, so that the "Thank you" page does not display after a user has filled out the form. AWeber support says the WordPress code they suspect is causing the problem is:
[10:27:58 AM] <div id=''lp_container'' class=''''><div id=''lp_container_noform'' class='' link-click-tracking''></div>
I have no idea where to find this in the wordpress files. Any clues?

Here's the page in question