Why does the center of the video look normal, while the sides look streched?

vbimport

#1

Ive been trying to solve this myself, but its hard to find an answer when you arent sure what its called.
I just got nero 7 ess, and on all my burned dvds, the center of the tv screen looks normal, while the sides looked warped and streched.
Its like you filmed it through a fish eyed lens.
Heres as much detail as i can think of:

the original video file was 16:9
the tv is 16:9
the dvd player is set to 16:9 (ive tried changing every aspect)
zoom features on the tv and dvd have been adjusted
ive tried both a 4:3 and my computer it has the same problem.
Ive used this burner with ashampoo and do not have the same problem

I know this has to be a setting in nero, but ive gone over it numerous times and cant seem to find anything.
anyone wanna float some help my way?