u/hereIam2play

I have a Sega CD model 1 and anytime I try to play mortal Kombat Sega CD it freezes. I have tried more than one copy. I read somewhere that mortal Kombat didn't work with model 1 Sega CD with a JVC drive and back then you could send away for a disc that would work. Is there any way to tell the difference between the discs? I enjoyed this port of mortal Kombat and would love to be able to play it again