my zen mozaic lx won't turn on or charge?

i connected zen mozaic lx to my xbox 360 like i always do, and the xbox didn't respond to the player connected to it, so I disconnected it but what I didn't notice was that the player had the "updating" thing lit up, so it turned off and now it doesn't turn on or respond when i connect it to my computer or my xbox. what should I do to fix it??? thanx please give me the proper solution!i tried resetting it but it still doesn't work, please read the entire question