I'm playing Galactic Civilizations 2: Dread Lords v1.0 and i have run into a problem.
I was playing on a huge map and i had 5 planets, then a problem occurs.
one of my most populated planets is under seige by the undead! this is basicly what it said and how i reached:

"Sir there is a crisis on SilverNight! Following the research conducted in to The Undead Worrier science believes that the chemical compounds have become air born! Now the colony is been terrorised by undead citizens! Further research found that if their saliva reachs your blood stream then you will die and join them! These newly risen dead people live again only to eat the living! our weapons have no effect, not even missiles! Also science says that this could reach across worlds! What should we do?

[*] Dear Gods! Help those people! erect walls, build fences what ever it takes to keep them at bay. also, if you can, stop it from spreading off world. (+20% Morale, -10 million population)
[] What! Well they cant leave world then, they run the risk of infecting others. Quarintine the planet. but send down supplies to help. (-100 million population)
[] What did you say? invincible worriers! Have them taken and dumped on enemy planets. the colony is expendible. (+50% soldiering, -1 billion population)

I chose good, but about a month later the same thing happened on Crenna and the colony was destroyed.

has anyone else run into this problem? if so how did you prevent it a second time?