Ninja forms aren't cloning

Hi there!

I have 3 distinct forms in my website and they are built with Ninja Forms Lite Version 1.3.4. When I clone this site forms aren’t cloned so have to build forms again… does anyone had this problem before? Do you know how to solve it?

Than you in advance!

http://wordpress.org/extend/plugins/add-cloned-sites-for-wpmu-batch/