I've tried a number of different versions of MAME and I've also tried different ROM's for Tempest and no matter what I try the game always stops after I start playing the red sets. I might be able able to play four or five screens into it but eventually the current game I am playing stops and it goes back to the start screen for Tempest. My OS is Windows 7-64. I've tried a 64 bit version of MAME as well as MAME32 with the same results. Any ideas for why this is happening?