one more thing. i just realized that my column that shows the duration based on 7 day calendar (again, my project calendar is still standard 5 day calendar, but only this column is showing durations based on a 7 day calendar), I realized that my new column's summary activities are all 0. i mean individual activities are all fine as far as calculating the calendar days from start to finish, and displaying it, but, their summary activities do not calculate anything and all zero, including the project summary activity at the very top which also shows zero for this column. How can I make the summary activities show the correct calendar day duration for this column?