Postpone margin

Hi,

I have two questions:

1. I am implementing a client which will use postpone margin in Master Planning. I do not want to allow system create postpone message in which the difference between the supply and demand is 7 days or less. I place 7 in the parameter, but still creates message. I tried 8 and it did not. Should I place +1 days to have this work in the way I want.

2. Regarding the issue in (1), I have also checked the hour parameters in used in planning. I have checked two parameters in MP parameters, checked the calendar. They all look fine. But when I check the inventtrans.TimeExpected it is always 12:00 AM. Is it possible Postpone message is effected from that parameter.

Thanks in advance for the answers...