non-leading ledger posting

hi sap guru's

I have created two aditional ledgers, my problem appears in posting a fi document using transaction code FB01 ( system post to all ledgers). I want only to post in 0L Ledger and in the representative ledger. How can i define system to not post in an aditional ledger, only to post in this aditional ledger using transaction code FB50L?

regards

jleal