关于数据迁移出现 ORA-12154: TNS: 无法解析指定的连接标识符（救命啊）

进行两个数据库的同步迁移，两个库都装在本机虚拟机上，都是10G的。PL/SQL能连上去，但是在运行这个同步工具时，却连不上，报下面这个错。各位大哥，麻烦帮帮我，这问题困扰我很久了。

这是报错信息
System.Data.OleDb.OleDbException: ORA-12154: TNS: 无法解析指定的连接标识符
  at System.Data.OleDb.OleDbConnection.ProcessResults(Int32 hr)
  at System.Data.OleDb.OleDbConnection.InitializeProvider()
  at System.Data.OleDb.OleDbConnection.Open()
  at TransData.TransForm.ImportData(string strXml,Int32 iIndex)

怎么还没人来搭救啊！

SQL code

--tnsnames.ora的内容贴上来看看!
--lsnrctl
  status
  --start
  --stop

# tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

YNDCZD =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP)(HOST = 10.40.0.104)(PORT = 1521))
  )
  (CONNECT_DATA =
  (SERVICE_NAME = YNDCZD)
  )
  )

YNZDLK =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP)(HOST = 10.40.0.104)(PORT = 1521))
  )
  (CONNECT_DATA =
  (SERVICE_NAME = YNZDLK)
  )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
  )
  (CONNECT_DATA =
  (SID = PLSExtProc)
  (PRESENTATION = RO)
  )
  )

连接字符串是否正确、