What specs do you have?
- Some major problems occured an system with WinME
- There may also be problems with the graphic card (installed latest drivers?)
- or with directx (which version do you have?)
- or with the CD-ROM-Drive (what type do you have?)
- or in thw worst case with the CD
Try to get an answer on the official forum:
http://195.154.206.6/ubb_uk/cgi-bin/Ultimate.cgi
Or here (Darkstone Tech Support FAQ):
http://www.godgames.com/games/darkstone/support.html