Unable to explode multilevel BOM with usage 3

Hi All,

Need to explode multilevel BOM with usage 3 in sales order:

1. Created Material 75 with ERLA item category

2. Material 69 again with ERLA item category explode multilevel BOM with usage 3

3. Material 73 with NORM and assiged to 69 in CS01 with usage 3

4. Material 74 with NORM and assigned to 75 in CS01 with usage 3

ZESO ERLA =ZTAQ

ZESO ERLA ZTAQ =ZTAE

ZESO NORM = ZTAQ

ZESO NORM ZTAQ= ZTAE

When I am creating sales order, it showing me:

10 75 1 NOS Material for Universal BOM Usage ZTAQ

And not exploding BOM.

Pls help.