BOM Item creation, Ax 2012

Hi,

I want to create BOM Product. for this I create one Product - 1000 .then I went to

default order setting in Manage inventory TAB, nd select Production.

now I want to add some items. for that I have to go to Engineer Tab

nd select Lines.

But the Lines buttom is not Active. Where im doing wrong.

In the Engineer Fast tab> You will find a field “Production type” set it to “BOM”