Shou, If your game is really old, and it came with a 16 bit installer then you have a problem. Windows 7 x64 will not run the 16 bit installer.
Some people (in these forums) have had some luck with these older games that utilized a 16 bit installer by simply dropping the game files directly into a specific folder to run the game out of. (The game was actually a x86, 32-bit, game, but it's installer was 16 bit).
I am not sure if this addresses the specific problem you are having or not, so I am just tossing it out there for your information. Hope it helps.