I just finished having a birthday party with 9 friends. We were playing two player social slayer online. I have a panasonic vierra plasma 1080p 50" TV. In the main menu of halo everything was widescreen. When I started the online slayer(or offline slayer) however, the screen would go out of wide screen with bars on either side. While playing wii earlier this did not happen (we were playing mario kart 64 and it did widescreen). I need help fixing this! 10 points!