ORACLE数据库无法连接

jingbian

[fc@fc bin]$ ./sqlplus hjgd/jikey@HRDL
SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 8 11:55:05 2005
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
ERROR:
ORA-03134: Connections to this server version are no longer supported.
Enter user-name: hjgd
Enter password:
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
Enter user-name:
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus
[fc@fc bin]$