There is an implicit restriction on the name of ROOT directory for Wordpress due to a simple bug in wp-includes/classes.php.
For example, if your ROOT directory is, say, "/en" and Permalinks configuration is other than default (so that Rewrite check will happen), you cannot use Input Field Settings of cforms because $req_uri, which the AJAX URL used by cforms, say, /en/wp-content/plugins/cforms/js/include/textfield.php, won't match to $self, which will mistakenly be wp-contt/plugins/cforms/js/include/textfield.php. Notice wp-contt should be wp-content.
