Related to sales Order

Hi,

I created one sales order with 1 machine(item) and 1 Qty when i explode it then 15 sub-assembly created but not papulate the qty of every sub-assembly.if i create a sales order with 1 sub-assembly(item) with 1 qty and explod it then 10 item are created and qty papulated.if machine explode no papulate the qty but sub-assembly explode then qty papulated. i want the when machine explode then qty automatic papulate the subassembly when subassembly exploded then automatic qty papulate the item.if any setup related to this please tell me.

Thanks

Sunil Mishra