I just saw your email and you were using Import->Batch Audio to just pull in audio files. Importing an audio file means that MobileSheetsPro will just display a blank page but give you the option to play back that audio in the audio player. Were you expecting it to display a score from the audio file? That is far beyond the capabilities of the audio file processing in MobileSheetsPro. If that is a necessary feature for you, I can cancel/refund your order if MobileSheetsPro won't meet your needs.
Mike
Mike