Why can't the Previous button work while a Windows Media format file is played back with SonicStage?

The previous song cannot be played back after clicking Previous during the playback of a Windows Media format file with SonicStage.


Playback starts from the beginning of the file that is played back currently and not the previous file even after clicking Previous.
To avoid this symptom, select the file to be played back by double-clicking on the Playlist.

Note:
This symptom does not occur when playing back files in formats such as OpenMG (ATRAC3) and MP3.