Interbranch Transfer Price by Customer Group

I am having problems getting the correct transfer price to come in based on an item/customer group set up in base price. It seems like the customer price group for the B/P's associated A/B number is not retrieved and the result is that the item base price defaults as the cost on the sales order.  This is a simple customer group - not complex.  If I set it up based on item/customer hierarchy the correct transfer price defaults into the sales order cost. Has anyone had any luck using customer group with interbranch sales?