My Zen Mosaic Mp3 player will not turn on after being charged...help. :(?

Ok, I have had many problems with my Mp3 player, so this one I have not resolved. My mp3 player was about to die when I turned it on so I turned it back off. Later that day I turned it back on and it said that battery dead turning off. I took to the charger and the light turned on saying charging. I gave it a full nights charge and tried turning it on in the morning, it did not turn on. :( So I pushed the reset button like I have before and it did not work. I plugged it into my computer.. nothing. Tried recharging, still nothing. Is it the internal battery or not getting a good charge?
Please help. :(