newbie question: can't get dvd's to play!

[Nimil]

first, let me say, i used the search function and couldn't find anything that actually matched my question, so if this has already been answered please point me in that direction :D

*ahem*

i downloaded the bsplayer a few moments ago, and tried to play a dvd (dawn of the dead) on it. when i popped the dvd in, it displayed a playlist, and started to play the beginning of the dvd (fbi warning, and the universal cinematic) then i tried to get it to skip to chapter two, only to be told that it could not play the file.

dvd works in everything else...that plays a dvd...so...um...what's my problem?

thanks in advance.