A default installation of 11g R2 18.104.22.168.0 may not be very pleasant for Oracle developers who are still working with Developer 6i suite!
Our test lab installation has by default taken “NLS_CHARACTERSET
As a workaround, we dropped the database and re-created it using database character set “WE8MSWIN1252” and later with “AR8MSWIN1256” as we needed Arabic support
An interesting discussion could be found here about the character set
Now, we are able to connect to the database, continue our development using developer 6i
Note: Please consult Oracle prior applying such workaround solutions to production environments. Our main intention was to find out a method to connect to 11g R2 database from Developer 6i products.