Dvd

Hi again sorry to be a pest .
I installed kmplayer and the dvd has a flicker kind of like a real old movie only real slow like a shutter passing over the picture all the time.
I am running xp pro 256 mem 256 m0re on order.
I set the refresh rate at 75.
It is the same with the dvd play or burn deck.
Could someone help me with my stupid mess?
THANK YOU
Bob