I have a executable application that using Oracle ODBC Driver V9.2. My Old server Have Oracle 10g on windows 2003 32bit. I install and configure new server using Oracle 11g on Windows Server 2016 x64. SQL*Plus on My client PC can connect to My Oracle 11g On server side, but my application failed to connect to server. I Installed Oracle 11g ODBC Driver on client, But my problem still exists.