I update to the Actual Work field for the assignment by psi,But no data is displayed in Timesheet?

Hello everyone.

I use the code to update to the Actual Work field for the assignment by psi,it works success.but the timesheet can't see my Actual Work in 9.2 this day,why?

<Changes><Proj ID="a47faeab-0f72-455a-b629-d62faf5fece6"><Assn ID="6c9888a8-a782-47ac-a905-e84ad1fe0fb2"><Change PID="251658274">
        25</Change><PeriodChange PID="251658250" Start="2006-10-27T08:00:00" End="2006-10-27T12:00:00">
        240000</PeriodChange><PeriodChange PID="251658250"  Start="2006-10-28T08:00:00" End="2006-10-27T12:00:00">
        120000</PeriodChange><PeriodChange PID="251658250"  Start="2006-10-29T08:00:00" End="2006-10-27T12:00:00">
        360000</PeriodChange></Assn></Proj></Changes>