Disable the old listener service.

1. Display the Services dialog.

2. Select the old listener. The name of the old listener is OracleTNSListener.

3. Stop the old listener, if it is running.

4. Right-click the old listener and select Properties.

5. Set its startup type to Disabled, and click OK.

There should be another listener service with the name OracleTNSListenerFsl. This listener was created when you added the OracleAS Metadata Repository to the failover group (in step 1). This is the listener you will be using.

http://docs.oracle.com/cd/B14099_19/core.1012/b14003/trans_cfc.htm