C#远程连接Oracle数据库问题，急~~~~

用的这种方法Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.1) (PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=name)));Persist Security Info=True;User Id=system; Password=asd;
但是连接的时候老是提示：ORA-12514: TNS:listener does not currently know of service requested in connect descriptor 这个错误，
请大侠来帮忙看看这个要怎样改呀，先谢过了~~~