Transaction control with DI Server and B1WS

Hi everyone,

recentily I started working with DI server and B1WS, and talking with friends and with a brief research in the foruns Its seens to be impossible to have a Rollback in database transactions performed with DI server and B1WS.

Its really true? I mean, I receive the Session ID when I use the login service, it shouldn't be so difficult to have a rollback function with this info...