Confirmation quantity is getting in Base unit of measure against operations in original orders

Hi Sapients,

In the routing for a material in the standard value tab , had maintained the conversion unit of measure.But the base unit of measure and operational unit of measure is KG only.I had created the combined order " A" with  original orders 1,2 &3. When confirming the the combined order , the operational quantity is being confirmed ,but in the original orders instead of the operational quantity , the system is confirming the quantity  with base unit of measure . But I need  operational quantity against operations in the original orders . How to achieve this? Please throw some light on this.

Thanks in advance.

With Regards,

Aditya