I want to download the TOA Expansion soon, but I read that first you need to update all of your games. So, since I just got DSL, I hadn't done this until now. Everything was downloading contently until I came to the expansion pack, DA. For some reason whenever I click 'update' the screen switches to the shop area of galciv2.com. What do I need to do? I have a feeling it has something to do with the serial number, which I don't think I ever entered. Can someone tell me where to find the serial number if that is the case?