Funds check in R12 from external feeder systems

We are upgrading from 11.5.10 to R12. We used to peform Funds check from external feeder systems by first inserting data into the gl_bc_packets table and then calling the APPS.GL_FUNDS_CHECKER_PKG.

With r12, we am inserting same data into the GL_BC_PACKETS and calling the PSA_FUNDS_CHECKER_PKG.GLXFCK. I have replaced the set_of_books_id with ledger id.  In 11.5.10 we used the ussgl transaction code as we are public sector  but in R12 with SLA it is no longer valid. With r12, has anything else changed with gl_bc_packets (other than ledger_id). My transaction is getting stuck in workflow