Default Music player + ReadyNas

hi, i am running my netgear readynas for music and videos. everything works fine with samsung TV, ps3, xbox, asus transformer but when i try and use it to play music with my s4 using the samsung music player it finds it under nearby devices but only finds one file thats actually not even a music file, its a video mp4 calibration file.

any ideas whats happening, same thing happens on my tab 3 8" too.