DO Formbuilder multilingual

hi! i have a country table with: iso_code, name_en, name_de i builded my DataObject: //////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// /* the code above is auto generated do not remove the tag below */ ###END_AUTOCODE function do_country(){ $this->fb_linkDisplayFields = array('name_'.LANG); //parent::DB_DataObject(); } } //////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////// LANG ist my languagecode ( 'de' or 'en') so as you see i wrote a constructor to set the displayColumn name_en or name_de it works ... but doesnt i have to call the parent constructor?? see at //parent::DB_DataObject(); ??