iPod says 'connect to power' but after connecting and leaving connected for a while, it is still not responding. Help!

My iPod Nano (3rd generation) ran out of battery the other day. It said 'Low Power' and 'Connect to Power' and now these are just visible on the screen, but barely. I have tried plugging it in to recharge it, but it doesn't seem to register the power source. I can not turn it on/off either as none of the buttons seem to be working.

Is there anything I can do to fix this.