10的bug吗

情况一:

C:\Documents and Settings\Administrator>sqlplus "system/solaris@li as sysdba"

SQL*Plus: Release 10.2.0.1.0 - Production on 星期三 4月 4 08:38:15 2007

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

ERROR:
ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务

情况二:

C:\Documents and Settings\Administrator>set oracle_sid=li
C:\Documents and Settings\Administrator>sqlplus "system/solaris as sysdba"

SQL*Plus: Release 10.2.0.1.0 - Production on 星期三 4月 4 08:40:31 2007

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL>
如果使用sid登陆则登陆不上去
tns.ora:
li =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL =TCP)(host=COMPUTER)(PORT=1521))
    )
    (CONNECT_DATA =
     (service_name=LI)

    )
  )

sqlnet.ora
SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
请高手帮解决一下

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