[ddouglass]

As far as I know the only limitation on the demo is to only import and play shortened copies of the files. Be sure you have all the Windows updates. This means going to Windows or Microsoft Update and using Custom update. If you use the Express or Automatic update the only ones you get are those deemed as critical by Microsoft.
I would also recommend getting the latest drivers for your sound card. How much memory does this Soundmax card have?
Make sure the Windows sounds are turned off as well. This can cause the beeps, etc. when you don't want them.
If you plan on using this program on your show computer I would also test it on that as it may work there better than your home computer, since you normally have more programs and background processes loaded on a home use system than you would on a show computer.