ALV Showing Blank Screen , But When Scrol down Shows data ?

Hi All,

IN my OOPS ALV i am calling various ALV on double click event.

at the output of ALV initialy its show BLANK SCREEN , if i scroll it down then

behind that blank screen ALV container showing data .

How to remove blank screen from ALV ? or Shadow of screen ?

Already i serach so many post but no match found.