Hello, Could someone help me with this problem please?

I have been using BluffTitler for a couple days now and everything seems to work just fine. However, the only problem am having is when am working with a Video/Audio layer... there's no sound on those videos when I export them as a movie.

I checked BluffTitler's site for user's guide and I found this warning when working with Video/Audio layers

"When creating an AVI file, BluffTitler only exports the visuals. Use the audio layer only for realtime applications like VJ-ing, digital kiosks and TV or for previewing/synchronizing purposes."

The thing is I have no idea what that's means... will it work if I install any of those applications? if so could you please tell me how to do so?

Thank You!