Created Database Link But Does Not Function

in a 9.2.0 db I create a db link but does not function :

CREATE DATABASE LINK "ONEDB"
  CONNECT TO "user1" IDENTIFIED BY "****" USING 'ONEDB';

SQL> select * from dual@"ONEDB";
select * from dual@"ONEDB"
                   *
ERROR : ORA-12154: TNS:could not resolve service nameBut on the same server I can connect to 11g in sqlplus :

Z:>sqlplus /nolog
SQL*Plus: Release 11.2.0.3.0 Production on Mar. Juin 19 10:13:45 2012
Copyright (c) 1982, 2011, Oracle.  All rights reserved.

SQL> connect user1@ONEDB
password :
Connected.Of cours the other DB links toward 9.2.0 databases work well.