No i did change it and it was working 1st but don't know what happen now? below at the page where it show "Done" it show javascript:;
In headerinclude template, find:
var removeattach_confirm = "{$lang->removeattach_confirm}";
Below it, add:
var loading_text = '{$lang->ajax_loading}';
var saving_changes = '{$lang->saving_changes}';
You probably removed it by accident
That will either fix it, or show another error to fix your problem
Thanks DennisTT that code gave was missing all rite