I authored a dvd using svcd2dvdmpg and dvdlab. I burned with instantdisc.

When I stick the dvd-r into my computer, it plays fine with windvd. When I play it in my dad's sony dvd player it plays fine, and its older than my Koss. I used udf video 1.02 in instantcd. Can anyone tell me why the dvd player wont play my dvd-r? When I play it with my Koss, it says play then immediately goes to stop. Any suggestions would be great.

dvd recorder is in a toshiba satelite 2455 series
dvd medium is a memorex single sided version 2.0 dvd-r

Thanks again for assistance