services coming disabled in dba_services

SQL> select name,enabled from dba_services;
NAME                                                             ENA
---------------------------------------------------------------- ---
SYS$BACKGROUND                                                   NO
SYS$USERS                                                        NO
l81prod                                                          NO
lawson_l81prod.world                                             NO
law81.world                                                      NO
law81                                                            NO
law81_lawson.world                                               NO
lawson_law81qa.world                                             NO
law81qa                                                          NO
lawson_l81ut.world                                               NO
l81ut                                                            NO


Any suggestions please?


not able to make db connection using service



Best regards,
Vishal