k so i bought civ4 and beyond the sword, and when i try to play a normal game, its slow and you can't even see the terrain when playing. i went to driversguide.com to try to get a new video card, and it said it downloaded properly when i got a new one there but nothing changed. i meet the other min. system requirements because it has a 2.4GHZ and 480Mb of ram, and there is well over 1.7GB of free hardware space, IDK what to do i don't know why its so slow when playing