Widescreen Portable Dvd Player Why Do Divx Files Playback Stretched On My Widescreen Portable DVD Player?

Why Do Divx Files Playback Stretched On My Widescreen Portable DVD Player? - widescreen portable dvd player

This player can play DVDs fine, but the DivX files that are about ... Although when playing on the computer that has a perfect aspect ratio.
I noticed this with all DVD-DivX player I saw what must be quite frequent.
Thank you.