Integration between Purchasing and Project Costing via Project Manufacturing

I have a requirement to capture Project related purchase order for the items which have destination type as 'Inventory'. To handle the same, I have created a new organization under exsiting operating unit with following classifications and enable project reference (whereever applicable) -

• Inventory
• Project Task owning
• Project Manufacturing
• Project Expense

Upon doing this I have created a new project, where project owning org is the Organization that I have just created. Now when I go to the PO distribution line, I do not see any project being populated in the LOV and hence can not map my PO to the project.