Hi Siddappa,
as given in the Note:
Transaction SPRO and then 'Supplier Relationship Management' -> 'SRM Server' -> 'Cross Application Basic Settings' -> 'Define Objects in Backend System (Purch. Reqs, Reservations, Purch. Orders)
Another way to get the control is BADI BBP_TARGET_OBJTYPE which you could implement.
Regards
Oliver