After ripping with dvd decrypter their is no sound?

[odie]

After ripping tears of the sun with dvd decrypter their is no sound? I have ripped many many movies using this awesome tool, but in the last two days, two movies (Tears of the sun and spider-man)Had no sound at all after being ripped. I have tried ripping them several times each, only to find that their is no sound.
Any info wil be greatly appreciated.
Thanks,
Odie

[LIGHTNING UK!]

read the ripping/playback from hdd guide.

Playing the raw vob files isnt 100% reliable. players need the ifos to play properly. Only ripping all files in File mode or using ISO mode will work every time.
If you rip in file mode, use the 'Play dvd from folder' option in windvd/powerdvd.
If you rip in ISO mode, mount the ISO in daemon tools and play from its virtual drive as you would a real dvdrom.