DVD WS does not display right on Samsung 40'' HD... When I watch a movie (DVD WS) on this TV I

Question

When I watch a movie (DVD WS) on this TV I get a pciture in a long rectangular box that fills up the screen width wise but not top and bottom (so a really wide screen). The funny thing is at the beginning of the movie when the standard langauge appears it does fill up the whole screen but when the movie starts it squishes down to a long rectangular view.... What do I need to do to fix this?