Create BAPI call and bapi_transaction_commit

Hello,

I am working on a scenario in which I connect the IDES system with XI 3.0.

Therefore I take the RFC-adapter sender adapter, that calls the BAPI bapi_salesorder_createfromdat2. So far there is no problem, the call is successful, but unfortunately it is not possible to commit this work with another call BAPI_TRANSACTION_COMMIT. Why?

How is is possible to make this szenario via XI and a BAPI? So far as I have understood the concept of the rfc-adapter, there exists no logical unit of work, so it is actually correct that the second commit call doesn't work, but how can I still make an update via XI?

I hope somebody can help me here,

kind regards

Markus Semrau