if it was made on a mac the folder structure is good
you must not be ripping/burning it right
it has been a long time since i did it on a pc but basically you need to make a disc with the video_ts folder AND a audio_ts folder
some players will not work without the audio folder as well, it should be empty but there
imgburn recommended above i hear is really easy and works good, but make sure you have the audio_ts folder too and fwiw if someone who really knows what they are doing made the dvd it might also have a extras_ts folder which would include text files, md5, cover art - whatever extra they might include