Hi Shahid,
Follow these notes:
For DBCON - note 339092
Oracle client software must be installed - notes 539922, 521230
Network files tnsname.ora and sqlnet.ora must be updated note 571623.
1261329 - DBA Cockpit: Oracle as a remote database.
And for Code Page conversion, please provide some more insight on that ST22 dump.
Regards,
Divyanshu