Pricing issue with Product hierarchy - Urgent

Hello,

I have an issue on pricing determination with product hierarchy.

I created product hierarchy as following,

level1 - A0001

level2 - A0001B0001

level3 - A0001B0001C0001

Then, assigned A0001B0001C0001 to material D in material master.

I created condition record with A0001B0001C0001(level 3), the system found the condition sucessfully when I created a sales order with material D.

However, I created condition record with A0001(level1) but the system didn't get the price when I created the sales order with material D. Since A0001B0001C0001 belongs to A0001, the system is supposed to get the price from the condition record with A0001...

Could you please let me know how to fix it?