I'm trying to get Burnout to work in 1080i and I'm having difficulties.

Xbox (of course)
Yamaha RX-V1000 A/V Receiver
Microsoft Hi Def A/V Pack
Mitsubishi 55" Platinum Plus HDTV Ready TV
Burnout (Supposed to support 1080i)

I have tried bypassing the Receiver with no luck. When the game starts, the TV is receiving a 480p signal. The 1080i option is set to "yes" in the XBox menu. I even tried setting 480p to no in the XBox setup. The game then downgraded to 480i.

The component cables out of the XBox are plugged into a component input on the TV labelled as 1080i component in.