I went back and checked the DVD player settings. I discovered two places where I had the option of choosing Digital Bit Stream output or PCM. One was set for Bit Stream, the other to PCM. When I choose Bit Stream for both options, I was able to get my receiver to recognize the DTS format.

I'm not sure what PCM was (I might even be forgetting the proper acronym as I didn't sleep much with all that music blaring, LOL.) However, for experimental sake I also tried PCM for both output settings and couldn't get a peep in any mode from the receiver.

Thanks for all the great suggestions. I now have

With great power comes Awesome irresponsibility.