Ipod Shuffle problem

My iPod shuffle will not respond to my PC. It was working fine a few days ago, but I wanted to add new songs and it wont connect to the computer. It doesnt show up in My Computer as a disk drive or in iTunes. When I plug it in it shows an orange light flashing on the front, which is suppose to mean its charging or syncing, but I get neither. The procedure is actually like this; Plug in and I get a green light. Then it flashes quick green, then blinking orange. My PC doesnt seem to recognize the iPod is trying to operate with the computer. What do I do to fix this?

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