Hello Antonio and Siva Raman,
I have also struggled a lot with this issue.
The problem is we need to have a switch activated in system.
LOG_MMFI_P2P is the business function that you need to activate.
Make sure that switch MM_SFWS_CI_01 is on and has Global status as on.
Use TCode SFW5 for switch activation.
Thanks,
Zuber