Vista - Asus Ati 4870 1gb mpg2 video files problem

Hi recently i bougt a 4870 graphic card. after installing it when i play a dvd or mpg2 files on windows media player the screen jumping like splashing. i installed K-Lite Softwrare and played dvd on media player classic , my problem solved but in windows media player the problem is like before. what is the problem ? ( i`m using Vista SP1 X64 ) in windows 7 build 7057 x64 i have this problem too and after istalling K-lite , in media player classic my problem didn`t solved. and while windows indexing files on vob and mpg2 files screen jumping again. please help me. i think if i can default k-lite mpg2 codecs for windows my problem will be slove. waiting for your answers thanks see this link too : Asus Ati 4870 1gb mpg2 video files problem - techPowerUp! Forums