I've had the same problem with 2 DVD's.

When i ripped the DVD's with smartripper it couldn't unlock the drive but rip the vob's OK (now i know how to unlock, but didn't tried at all).
Then i've tried to frameserv the files in DVDx and no Subtitles (in DVDx i could select the subtitles but in preview they disapear).
Could this happen because the drive wasn't unlocked?

- The subs in both DVD's are locked in reprodution, it can't be removed.
- I've also tried DVDdecrypter and the result was the same, no subtitles.
- Opening the DVD directly in DVDx (no rip) the result was, no subtitles.

Help me please...