Yes you should hear sound if your using WinDVD or PowerDVD or similar to play the IFO/VOB files.
Unfortunately the latest BeSweet (and that includes BeSweet GUI & AC3 Machine) no longer produces AC3 files, even though it goes through the motions.
Check out TMPGEnc Sound AC-3 Plugin for converting your WAV to AC3. It does work. I will be posting a Tute in the next day or so on how to use it.