What Vegas does is render a separate video and audio stream specifically for DVD Architect. This is why each file only has video or audio. That is to be expected. What DVD Architect does it combine these back into the VOB file that DVD's require. I don't know why DVD Architect won't accept the audio that is rendered from Vegas.
Do you have any codec-paks installed on your PC like "K-Lite"? Could it be that the Vegas AC3 encoder has been replaced with another AC3 encoder that DVD Architect can't use?
~jr
http://www.johnrofrano.com
http://www.vasst.com
