Last Inserted data didn't show in Report Viewer

Good Evening everyone.

I have a problem with report.
Right now i can create report, but after i insert new data and click button to generate report, my last inserted data didn't show.
If i close the program and run it again, the report show my last inserted data, but if try to insert another new data, the report didn't show it(again).

For example :
i have form that can insert data and create report.
when i create report, the report show 10 data.
and after i insert new data, the report still show 10 data.
but if i close the program n show report, the report show 11 data.


I'm using report viewer in VS 2010

Somebody please help me.
thanks before
:)