When playing Gal Civ II UE, the game locks up when I am late in the game.  I click the turn button and it never completes the turn.  I can manuever around the interface, but can't take my next turn becuase the turn button never comes back.  My original install was from disk.  I have tried uninstalling and reinstalling using a downloaded version, but the same thing happens.  This is very frustrating becuase I am unable to finish a game.  Any suggestions on how to fix this?  If I can't fix this, it is not worth playing.