Audio issues in VS9

[Para1928]

Hi
I have been using VS9 for a few months now and have been pleased with the results so far. I have made a pretty decent DVD of our family holiday to Florida and, once I was happy with the final disc, deleted all the files of my computer.
I then decided that I wanted to capture certain chapters from the disc and add them to another project I was doing.
I captured the chapters I wanted and they played OK in media player but once I either brought them on to the timeline, or tried to add them to a 'shared' project I lost all the sound.
Can anyone think of a reason why this might happen.
Any help is much appreciated
Thank you

[DiscCoasterPro]

I wonder if it has anything to do with type 1 and type 2 DV captures