Field Selection for Data Screen in material master data

Hello..

Hope you can help me, I set up this field in the Material Master configuration. Here the steps I did:

1.- I have defined this field : MARC-KAUSF with the Selection Group 213 (Transaction OMSR)

2.- In txn OMS9 I set that Group 213 for my Material Type KAUF as "Opt Entry"

Now when I go to display may material and go to MRP4 view, that field does not appear!!!

What Im missing?