Probably your disk is scratched... i find that rubbing toothpaste, or soap on it works best, then dry it off with a soft cloth.
[color=blue]People like to feel that they are making a difference. We are so ridden by guilt, that we give to charity. But, in our vanity, we only give if it seems people we idolize care. People are sheep, mindless and followers. They need leaders. But, you and me, we're different. We don't need leadership. -Sir Anthony