I guess we are many with that error. First time, i was thinking it was "No reload" option. But still had crashes. Tried another version of the game (first i used gold edition by ALI). Same. Tried latest 1.4 by RLD, same. It seems that "Undetected" is the problem (saw now after reading here @ MAF -- FC4 trainer comments).
If there will be no fix for that, then we have to disable that option when we play mission with the elephant.