We can definitely help figure out why you're getting that error message, but we'll need to gather some more information from you. Would you be willing to get Audiobook Builder to present the error again, then just after create a System Profiler/Information report and send it over to us? You can create one of these reports by launching /Applications/Utilities/System Profiler.app (or System Information.app, if you're running Lion) and selecting "Save…" from the File menu. Attach the report to an email, send it to
support@splasm.com, and we'll have a look at it and let you know what we find. Thanks!