Never ever had a problem with CS on supporting mobos - if anything Ive had problems with some older drives that are not happy as having a newer drive as a slave using MA and SL. Bung it on CS and away you go.
Check the cable hasn't come loose, its worth replacing it as its cheap to do but its isn't likely to be the cable. I would suspect Controller or IDE chain. Is the board overheating at all?
Also worth trying a different drive as well.