I have ACE mega codec pack, but for some reason, some videos don't work. I've try uninstalling Ace, and loading the different types, from professional, to just player. Nothing works. Then sometimes, or always on some videos, it is half black and white, the other half is fine. Other times, some of the video is all green. I don't know what the heck to do. I would really love it if you guys could help me out with this, it has been bothering me for a while. thank you.