Oracle9i r2 on nwindows 32 bit latform
Objective: Asynchronous replication using Advance replication API

iv already executed successfully the following packages
dbms_repcat.create_master_repgroup
dbms_repcat.create_master_repobject
dbms_repcat.generate_replication_support

BUT I keep getting

'ORA-02055: distributed update operation failed rollback required ...'

while trying to execute dbms_repcat.add_master_database in primary master database

Plz help