I installed DS as a demo to try it and it's crashing out on me. I get as far as actually maiking a word but when I submit it, the app closes out on me.

The contents of log.txt are:

7:10 PM - defaults.dat not found, using internal defaults.
7:10 PM - Game started on Sunday, January 11 2004.
ERROR - 7:10 PM - Error loading graphics\fireball.bmp

Any suggestions?