We are planning to upgrade our AE to version 11.2. For this we have obtained a temp license for QA for testing. We are doing a fresh installation on a Windows 2012R2 box. After installing Oracle database 12c, when we run the Single Box setup installer we are not able to go beyond the screen where we have to enter the database connection values. When we test the connection we get the error "Listener refused the connection with the following error ORA-12514, TNS-listener doesn't currently know of service requested in connect descriptor." So we got our DBA involved but didn't make much progress. Any help would be appreciated.