hi, i have a toshiba dvd-player (Sd-3900) and a sony surround sound reciever (STR-de945), they are connected through a digital coax cable. Everything plays fine through the system, stereo, dobly digital and all, except for DTS. Both units say they are DTS compatible, but whenver i try to play a dts disc, no sound comes through. I havent found anything in the sony reciever menu to activate dts, nor in the dvd player menu (through setup without a disc in). I'm curious if anyone could try and help me out with this, or knows what i might have to do. thank you