Weird problem with media files

[iguana]

hi everybody,
i burned some divx movies on a dvd-r disc,the disk looks ok and is accesible,i can even see the thumbnails of the movies but bsplayer gives me the following message

byrnBSPlayer v1.00.808, Unhandled exception at EIP: 77E73887
If you click 'Close' application will be terminated.
Please report this info to the author with description what were you doing.
External exception E06D7363
EExternalException
, 0x004F044F, 0x004F064D, 0x004535D3, 0x0044A91E, 0x77D43A50, 0x77D43B1F, 0x77D43D79, 0x77D44374, 0x004F1738, 0x77E814C7

media player also says something about runtime error.Same files when i copy them to the hard drive play ok..Also they play ok from the cd on another pc ..Same thing happened to the last 3 or 4 dvd-r i used. what can be wrong??
thanks