Found a solution: just turn into a comment the last part of the code, is a temporal fix and you’ll not able to load language files, but works.
// Load languages file
/*add_action(‘plugins_loaded’, array(&$this,’mfcf7_plugin_init’));
function mfcf7_plugin_init() {
load_plugin_textdomain( ‘zl-mfcf7′, false, dirname(plugin_basename(__FILE__)).’/languages/’ );
}*/
?>