Problem With The Game "millennium - Return To Earth"

[Donedeal]

Everytime I have played this game I get to a part where the moon is getting attacked. Anyways, when I try to defend it by launching my fighter ships the game closes and says an error message about a illegal operation and the program must be terminated(closed). I love playing this game so please can someone one tell me how to fix this problem?

[The Fifth Horseman]

Are you using DosBox?

[carpetsmoker]

The exact error message?
Your Operating system?

Always post as much data as you can when asking for help, never to much!