Update master opportunity, based on sub-opportunity data

Hi,

I need to update Master opportunity data based on sub-opportunity data. For this i implemented ORDER_SAVE badi.

Here i am able to  populate the Master opportunity data based on newly changed sub-opportunity data and i can call CRM_ORDER_MAINTAIN for Master Opportunity with updated data.

But save is not calling for that order. means, the data is in buffer only not in database.

I think, we need to register the other order for save(like in actions).

Can anyone aware of this ?

Thanks & Regards

Vijay