The game is TRAINZ Railroad Simulator 2006. Now, the game works perfectly when I run it as-is. But...when I try to use the download station, to get more locomotives, it doesn't. Once I have downloaded at least one thing, the game won't start. The game (but not the computer) freezes when I hit "start" on the game menu. HOWEVER, if I uninstall and reinstall the game, it works perfectly yet again.