I have a Toshiba SD-2300 DVD player and a Yamaha HTR-5450 receiver. My problem is that when I watch a DVD I switch the receiver from Dolby Digital to DTS I get no sound. I have the DVD player hooked up to the reciever using the digital imput since my DVD player doesn't not have optical outputs. Since the digital imput is labeled CD, I changed the I/O Assign to DVD, but still no signal. Any suggestions that anyone has would be greatly appreciated.