R12.1.3: subledger acounting setup for addition in Fixed asset

HI all

i try to change the default accounting of addition cost in fixed asset using SLA, i need that the account af asset cost was the same as the asset clearing cost giving in the ap invoice

i like to do this personalisation for 2 segment in my chart of account, i processed as:

i creat account derivation rule for the segment Branch and i give as line type: source  " Payables Code Combination Identifier"

and for the segment department , i give as line type constant '03'

but when i generat accounting, it give me the default accounting.

can one can help me how the modifie the accounting of fixed asset addition using SLA?