用sys登录成功，然后操作，也说权限不足？
C:\Documents and Settings\David> sqlplus sys/david@shop

SQL*Plus: Release 8.1.7.0.0 - Production on 星期二 5月 29 17:13:25 2007

(c) Copyright 2000 Oracle Corporation. All rights reserved.


连接到:
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
With the Partitioning option
JServer Release 8.1.7.0.0 - Production

SQL> archive log list
ORA-01031: 权限不足

[解决办法]
在控制台用户中设置权限
[解决办法]
在sqlnet.ora 中设置
SQLNET.AUTHENTICATION_SERVICES= (NTS)