Bonus Buy doesn't work in VA01

Hi,

I would like to setup a bonus buy for my company and I had activated the Bonus Buy in customizing.

I activate the sales order Type "OR" and my customer to BB0000 Bonus Buy pricing schema.

I also create a Bonus buy by VBK1.

When I check everything and seems OK, then I create the sales order with order type OR.

The bonus buy fulfilled every criteria, but the bonus buy doesn't work.

Is anyone know what happens? and My system is Retail with ECC6.0

BR

John.