I thnik you may be having a problem I am having. I think all mucis files go through a conversion process in the server (you can obsevre thi sby a rotating icon next to the edit icon). When this icon stops rotating the convrsion would be over and you can play. You may also note that before the rotatin icon stops if you attempt to chanrg the menu the uploaded file will vanish. The speed of conversion is an issue I am trying to tackle which could be realetd to the server end. I think the solution could see more be to host RMS in a VPS or dedicated server. I call on all Pundits to help us out and confirm if my understanding is correct..