when i load divx movies, they load all the way and i can't play them. i press the button play, and the button changes to the pause so its supposed to be playing but it stays on the one frame. i can even navigate to different parts of the movie but it won't let me play anything. and in itunes also, i can't play any of my songs. and online quicktime audio as well. i'm assuming its a codec problem? but, for all of these problems, no error message appears. it just doesn't play. i have uninstalled and reinstalled k lite codec pack and divx bundle(including divx codecs). i run microsoft vista premium 64 bit. it runs a nvidia geforce go 6150. please help. thanks