I've set my xbox 360 up with my hd67n but can't seem to change the colour settings in the projector menu, it only gives me brightness, contrast and sharpness, it's as if it's plugged in via VGA and only gives those options?

The xbox is plugged in via HDMI though....

Other sources via HDMI give me a vast array of options to play around with usually such as colour etc, but the xbox doesn't and it looks quite washed out, any ideas?