sorry about your trouble. i have not actually tried a burn using vso, as i use ImgBurn. can you please give more details as to how the dvd is not getting burned properly. Please post a couple of items from the burn log, which can be found at C:\Documents and Settings…username…\My Documents\DVDFab\Log\ This is a text file that you can open with Notepad and copy and paste a few recent entries into a reply post.
please uninstall VSO drivers from device manager, reboot computer and reinstall dvdfab. if this doesnt work please follow a guide by stormjumper for uninstall / reinstall dvdfab.
for winxp http://club.cdfreaks.com/1711788-post1.html
for vista http://club.cdfreaks.com/1800187-post1.html