Not able to import Vendor Sites and Vendor Contacts

 Hi,

We are working on R12 Vendor Interface. We populated the all the 3 interface tables with data. We are able to successfully import the Vendors and we are trying to import the Vendor Sites and Contacts for Multiple Operating units. We populated the data in the sites and contacts Interface Tables and we are launching the Standard Sites and Contacts Import Programs. These programs are completing successfully but not creating the Sites and Contacts. Do we need to do any multi org setups for this or Do we need to do any payables setup?

Thanks in Advance

Narendra S