ok you need to stop it from booting into x3 config now in customize x3 bios option
there a option called autostart x3 config live disable it. you can go back into it by holding white button on controller on boot up of xbox.
reboot xbox will the m/s dash load
now have you got a larger hard drive in xbox and is the m/s dash on it
you need to get a download called auto installer delux 3 this will load a m/s dash as well as hacked dash to your xbox if you do not have one installed