Status : Failure -Test failed: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
You're asking to connect, and the server/listener is saying the database you want to connect to isn't there. Double check your SERVICE/SID information in your connection properties.
You have to check the service_name in the tnsnames.ora file located in the oracle installed folder.
Check one more whether the services are up or not.