[Plugin: MP3-jPlayer] Repeat not working

I wish to have MP3-jplayer play a single track which I nominate & then automatically repeat.
I have everything set in settings including autoplay & repeat; and nominated a directory where the Music files are stored.
On a given page I use
[mp3j track=”somefile.mp3″]
and it displays & plays as expected; but stops when it reaches the end. I want it to automatically repeat; which is what I thought ticking the “Repeat” default in settings would do.
The help mentions a loop parameter which I have used like:
[mp3j track=”somefile.mp3″ loop=’y’]; but that makes no difference.
What am I doing wrong? How can I make the default action to loop/repeat a single nominated track?
Thank you