"When I watch Dvd's in widescreen format am I suppose to have the black lines. It is a HDTV widescreen 46 big screen."
If the DVD is anamorphic widescreen and has an aspect ratio approximately 1.85:1, it should fill the screen. An example of such a film would be "True Lies."
However, if the DVD is anamorphic widescreen and has an aspect ratio approximately 2.35:1, which is wider, it will leave some black bars on the top and bottom on a widescreen HDTV. An example of such a film is any of the live action "Lord of the Rings" flicks.
This assumes that your DVD player is correctly configured to display a 16:9 image in its settings.
In the case that you get black bars with scope widescreen films, the only advice I have is to simply get used to it. You are watching the film in the way that it was designed to be viewed, so take solace in that fact. - Reinhart