Defining material provided by customer

Dear All

I have a problem in defining "Material Provided by Customer".I have created a matl of type"UNBW" .Further I have included this matl in the BOM of another FERT matl.On the item tab of BOM I have choosen the matl under ref.Then in the "STATUS and LONG TEXT" tab page

under the "FURTHER DATA " box when i choose the matl provision indicator and choose the code matl provided by Customer system is accepting.But after MRP run system is not showing anything about the customer matl.

When I went back to BOM and checked the box for matl Provision in F1 it shows that the "INDICATOR IS NOT ACTIVE FOR THE CUSTOMER SUPPLIED MATL.

What could be wrong.We are using SAP ECC 5.0

With best regards

Suryanarayana tata