sample code pasted from editable example page not working on live.datatables.net

I took the code from

http://datatables.net/release-datatables/examples/api/editable.html

and pasted into in the live site

http://live.datatables.net/ocukes/2

but the table cells are not editable.

I even changed the url to point directly at the page

http://datatables.net/release-datatables/examples/examples_support/editable_ajax.php

but still it doesnt work?

Can anyone help?

thanks!