on server (oracle server)
1. ensure that listener is running, "C:\app\Administrator\product\11.2.0\dbhome_1\BIN\lsnrctl status", it use "C:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN\listener.ora". the sample as below :
# listener.ora Network Configuration File: C:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora#...
