hey all, i am running a marantz 4400 receiver and sometimes i hook up my ps2 through a fibre optical cable to utilize my surround system. now, i set my receiver to auto so that it will detect the type of output being used by the game (pro logic, etc). this option works off dvd's or even regular tv. when i put it a game that has pro logic or dts and set my receiver to auto, it picks it up in stereo. why is that? my ps2 is set in the actual hardware option to use a digital signal and i also change the option in the game itself. any ideas/help would be appreciated. thanks!