Ah, well the serial key is not automatically entered for some reason. There are no valid serial keys on the back of the sleeve, or at least not full valid serial codes (would I stick two codes together?). When I leave the serial field blank, it tells me that User Name, Country and Serial have to be filled out. I am using Windows XP SP3. I had this same problem under Vista.
PS: I am currently off campus but should return on the 29th.