Hi Tolu,
is the connection test from DB02 successfull ?
Reason why I'm asking is because i have been at a client where the ORASID and SIDADM users use diffrent tnames.ora file like ORASID (/oracle/SID/11202/network/admin/tnsnames.ora) and SIDADM (/sapmnt/SID/profile/oracle/tnsnames.ora).
you can test from DB02 or you can use job (sa38) ADBC_TEST_CONNECTION to test the connection.
also in dbco Conn. Info only use the entried that was used to TNSPING (conenction name) with for instance SID.WORLD
Best Regards
Marius