codecs

i have windows xp pro with window media player 9 series & power dvd when i play music cd sound is ok but when playing dvd sound is very jumpie but the picture is fine what codecs do i need & where can i get it please help

i dont know 4 sure but goto download.com n type codec n download DivX codec .it worked 4 al my Divx files when media player cudnt play shit