My hard disk and dvd drives are set at DMA mode. I have burn a verbatim disc at 8x speed. i am burning some mkv files, i have cccp. the burn was a success, i can see the files in the dvd when i explore from "My Computer". But when i try to play the files, it come out a blue screen saying error in reading, verify any disc and press ok or cancel. Why my samsung dvd drive can't play the mkv files? i can play it in my hard disk. Any solution?