Thank you so much for getting back to me but I still can't get it to work so I'm at my wits end. I have made all the relevant files writable (the folders were initially 755 and the files were 644 but I changed them to 777 and 666) but when I click on the play list I created and then 'Change Skin Options" a pop-up box appear where you can make various selections, but whatever changes I try to make (such as un-clicking the auto play option) it just says 'Could not be saved. Try again'.
It gives me 2 skin options Compact Mp3 player 1.0 and Default player but exactly the same thing happens with both of them.
As I mentioned, my main concern is the auto play, I really want that to stop and I would love to make the player black to go with the rest of the color scheme for my website rather than blue.
I contacted my web hosting provider and they went through everything with me saying that everything looks in order and that I have made the files you suggested writable so... I really don't know what to do now. It appeares to be such a great plug-in, exactly what I was looking for but.. I've spent 2 weeks trying to get it to work now without any luck.
Would it be possible to email you my details and you could perhaps have a look for yourself logging in to my WordPress?
my url is test.michellehedberg.net