Why the shared musics are not shown on iTunes but the NAS is found?
If you put the wrong m3u file on your Qmultimedia Folder, it will cause the iTunes Program stop displaying the shared music from QNAP NAS. The music files are still existing on the NAS, but all the music in the SHARED on iTunes Program will disappear. (The issue seems that iTunes Program will drop the connection as long as there is one file format is incorrect.) Please check this how to for detail : http://wiki.qnap.