i just have the plain: GalCiv II Dread Lords. And I have none of the expansions as of yet.
ho ok, read this thread then : https://forums.stardock.com/122873
there is several different cases depending on your exact version of the game
and tell us if you still have problems,
on the other hand, after this read you might want to contact : support@stardock.com with a detailed description of your problem.
good luck 