I can play the Riddle of Master Lu for periods of time, but every so often the DOS box emulator crashes (version .70) at different parts of the game. I tried slowing down/ speeding up the game by holding ALT and tapping F12 , but it didn't seem to help. How can I get the DOS box to stop crashing ? Thank you for any help you can give me !

Windows XP
T2400 @ 1.83 GHZ
1.83 GHZ, .99 GB or RAM
Intel(R)