用oracle 9i的Net Configuration Assistant可以连接服务成功
但是用oracle 9iDS的Net Configuration Assistant却无法成功
提示：
ORA-12154：TNS：无法处理服务名
服务名用数据库名（SID）和计算机名都试过了，但都不成功！

还有oracle9i和oracle 9iDS都有监听程序 而本机只有一个网卡（及只有本机IP）
需要怎么处理啊？？

安装在不同的目录下啊
ORACLE_HOME 不一样，他调用的核心文件也会不同

我是在不同目录下,而且用JDeveloper时,有oracle.sql.converter.characterConverted12Byte异常信息

Hey, you want to complete the set up and solute your problem, please follow this steps:
1. You must make sure you have setted up the databse "net config"
2. You should remember the "server name"(this server name is include two parts: SIN and host name. such as ORCL.HOSTNAME)
3. Open the "Oracle Net managerment" and add the server name (iDS server name!!!!!) and fill up the forms with server name (this server name was which you remember in step 2), port and host name.

When you finish these steps you test the connect using the correct user_name and password. I hope you will be success.

And the other question, you encountered the error that depended on when and how did it happen.