Dear Peter mok,
Use T Code CKR1 to Re-organize the cost estimates.
In your case I hope you have marked but not released,If so I'm sure you will be able to see the cost
getting displayed under costing2 view Furture cost column.
If this is correct means in CKR1,select the radio button for Future standard Cost estimates and always
first check using test run and then deselect for the second time if you were successful in the first time.
Check and revert back.