I recieved Gal Civ II Dread Lords as a Christmas gift on Dec 25 2009.  I loaded it today 1-10-10.  Everything went fine to all of the default install instructions.  The game appears ready to play.  I also received an explansion disc....Twilight of the Arnor which will not install because it says it can not find Gal Civ II Dark Avatar.  (Which I remind you was installed using all of the install disks default locations.  ) Prior to attempting to load the expansion disk of Twilight of the Arnor, I went to the update page and installed all of the updates from the website.  Then I tried to load the expansion disk of Twilight of the Arnor and it says it can not find Gal Civ II Dark Avatar.   I thought Twilight of the Arnor was an expansion disk for Gal Civ II Dread lords?  What is Gal Civ II Dark AVatar?  Help please!!

Bruce