How do I charge my generic MP3 player?

I bought an off-brand generic MP3 player that looks like a iPod shuffle. It came with a USB cord and head phones but nothing else. I was able to load music onto it easily, but once the initial charge ran out, I cannot use it any longer.

I plugged in the USB cord into my laptop and the MP3 Player, the switch was on off, the head phones were in and red and blue led on the sides of the player lit up. I figured this meant it was charging. After about 30 seconds the MP3 player started playing music...the power button was still on off. I pulled out the head phones and let it sit over night, thinking it would charge. Nothing...it lasted about 30 seconds once I tryed using it, then just quit.