Oritron DVD600 DVD Player
Unfortunately you get what you pay for...
This is a cheap unit and it behaves that way.  I've had trouble with the audio when trying to output DTS.  The audio was cutting in and out frequently.  The menu system is also clunky on this model. I upgraded to a Pioneer DVD-434.  What a difference.  It's much easier to navigate the menus and I've had no trouble with the Dolby Digital and DTS output.  Spending the money for a nicer player is my suggestion to you.