I started playing Roller Coaster Tycoon 1 not too long ago and I have already noticed a problem. Apparently, when ever I try to open a saved game, an error occurs. I am using the disk that came in a 3-in-1 bundle including the first 3 Roller Coaster Tycoons and I play the game on a Windows 7 computer hardware. I need to know why this error occurs.