Hi,
As the system mentioned is 4.6c. I think its not UNICODE yet you might be having MDMP system. So you are not getting the ENCODING option. Check the link below
http://155.56.92.22/wiki/pages/viewpage.action?pageId=15269894
http://scn.sap.com/people/honggun.cho/blog/2009/06/23/unicode-revisited
Have you tried it in BINARY MODE? Do you get CODE PAGE addition in your system?
Cheers,
Arindam