There are very few CDR drives that can read the MediaCloq protected discs. Can you tell us what you are using? We are not aware that 2.315 would read/play a MediaCloq disc except certain discontinued drives.
As to why 2.400 won't do the same, we totally rewrote the player code. We did not pay attention to MediaCloq at all as it normally will not play on a computer. I'm at a loss why 2.315 would play!
