I can't get my NOMAD Jukebox Zen Xtra 60Gig to start up. It's started up before. I bought it secondhand just two days ago and I've been removing song the previous owner had put on it. Now I wanted to use Mediasource Organiser to add songs to it, when suddenly it said disconnected, while it was firmly plugged in and on. When I press the reset button, it freezes on the EAX logo. Not even removing the batteries helps. Any clue what to do?