TNS-12541: TNS: no listener (has to input user name)

Question

Hi!
I have installed Oracle10g successful. I have tested the connection in Net Manager and is successful in condition that I change the user name to system. How can I preset the user name, so that the system will not prompt me for input when I sqlplus?
Enclosed please find the output:
C:\>tnsping train
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 -
Production on 21-9月 -2005 12:10:04
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
C:\oracle\product\10.2.0\db_1\network\admin\sqlnet.ora
Used EZCONNECT adapter to resolve the alias
Attempting to contact (DESCRIPTION=
(CONNECT_DATA=
(SERVICE_NAME=train.plusten.com.cn))(ADDRESS=
(PROTOCOL=TCP)(HOST=210.245.166.72)
(PORT=1521)))
TNS-12541: TNS:no listener
C:\>sqlplus system/manager@train
SQL*Plus: Release 10.2.0.1.0 - Production on 星期三 9
月 21 12:14:16 2005
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-12541: TNS:no listener
Enter user-name:system //will prompt for user name and password
Enter password:
Connected to:
Oracle Database 10g Release 10.2.0.1.0 - Production
SQL> exit
Disconnected from Oracle Database 10g Release
10.2.0.1.0 - Production
C:\oracle\product\10.2.0\db_1\BIN>lsnrctl status
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 21-9月 -2005 16:43:31
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production
Start Date 21-9月 -2005 15:01:50
Uptime 0 days 1 hr. 41 min. 41 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
Listener Log File C:\oracle\product\10.2.0\db_1\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=orange.plusten.com.cn)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "train.plusten.com.cn" has 1 instance(s).
Instance "train", status READY, has 1 handler(s) for this service...
Service "trainXDB.plusten.com.cn" has 1 instance(s).
Instance "train", status READY, has 1 handler(s) for this service...
Service "train_XPT.plusten.com.cn" has 1 instance(s).
Instance "train", status READY, has 1 handler(s) for this service...
The command completed successfully

Answer 1

I am sorry. I am newbie in Oracle and still do not know how to solve it. Even I try sqlplus system/[email protected], the outcome is still the same. Enclosed pleae find my sqlnet.ora, listener.ora and tnsnames.ora files:
# sqlnet.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\sqlnet.ora
# Generated by Oracle configuration tools.
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
NAMES.DEFAULT_DOMAIN = plusten.com.cn
# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = ORANGE)(PORT = 1521))
# tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
TRAIN =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ORANGE)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = train.plusten.com.cn)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)