Incorrect XML

When I try to run the example here:

http://docs.dhtmlx.com/doku.php?id=tutorials:dhtmlxform_serverside_bound_form_fullcode

I get the error “incorrect XML” when I submit the changes.

When I check the XML in the “response”, it checks as valid.

Any thoughts?

Be sure that you have all correct pathes and run this demo with local server.