There are a few different reasons you might not be playing on the same Xbox 360 system that you originally bought. You might have upgraded to an Elite system for the bigger hard drive and black HDMI. More likely, your original system died and you were forced to have it replaced. Gamers who received new systems were in for an unpleasant surprise when they redownloaded their Arcade games or hooked up their old hard drive: the games they paid for would only work when connected to the Internet. No network connection, and they all reverted to demo versions. Microsoft has just released a tool that allows you to move those licenses over to a new console, but the question remains: what took so long?