Backflush from job in 6.1


We recently move to 6.1 and there is new feature in jobs that you can
set up backflush the material when you are adding the material s on job

WE found a problem with a job that it is back flushing a part which is
set not to back flush and is not back flushing one part which is set to

and i also recieve a message that "all parts could not be back flush"

Does any one have an idea what could be wrong.