Cannot see Item in Purchase Order

Summary

Created Catalog, Assign catalog Functional area, Created item and assigned category but cannot see item in purchase order

Content

Hi,

I have created new item org and new inventory org. Created cataog and assigned the item to the catalog and to the Orgs. I am able to see the Item in Sales Order(Order Managerment) but cannot see the item in the Purchase Order line Item lookup. I am surely missing somethig but I cannot see any steps to enable item in implementation guide. I am not purchaing functional but a technical person.

Version

R13