It's normal.
Make sure your dvd player is set to 16:9 as it's aspect ratio.
Also note that movies with a 2.35:1 ratio will stil display the bars since that ration is still wider than widescreen tv's.The 16:9 tv's are mostly in a ratio of 1.77 and most dvds are either 1.85, 1.66, and the real wide one of 2.35:1.
Widescreen tv's will get rid of the black bars for most dvds with 1.85, 1.77, and perhaps some of the 1.66. But with 2.35:1 it's showing you it's actual size and will always show the bars unless you zoom in causing you to cut the picture or stretch it.
Widescreen Tv's are also not supposed to rid of the black bars problem they are to give you the better resolution on dvds that are anamorphic (set you dvd player to 16:9). With enhanced for widescreen dvds your tv will show them better in reolution and quality than most 4:3 tvs can.