restore ipod shuffle 1st generation not successful

few day ago i restore my ipod but it not successful, after i try to plug it into computer again then computer won't recognize it and it not appear on itune too, i try 5R already but it seem doesn't fix anything because it doesn't have any signal so it cannot restore again or reinstall, when restart computer it still the same other R cannot fix it , can any one help me with this problem that will be appreciate.