PS3 displays and plays first 18 seconds of vob file stored o

[Roo]

I have a 2TB WDSharespace with Twonkey Media server loaded into the firmware.My personal dvd's have been ripped to one single vob file and placed in a shared dvd folder under the shared video folder on the WDSharespace.The problem I have is when I access the vob file with my ps3 only the first 18 seconds of the vob file are displayed and played on the ps3.If I rescan the content or restart the server the file will still only display or play for the 18 second period but if I rebuild the database I am able to view the entire movie to the end as well as it displays the full time length of the movie,I have tried to experiment with changing the "rescan in minutes" feature but still does not rectify this problem.Is there a way to rebuild the data base automatically to be able to fix this phenomenon.