iPod Touch 4th gen.

Hello guys. I have had my iPod Touch 4th gen for over a year now. I used to be able to plug my ipod into my computer but it started to stop working. It will not show up on "my computer", itunes, or charge. When I plug it in it says "USB device not recognized". I tried plugging it into diffferent ports, using a different cord, but when I plugged anyting else into the non-working plug it worked. I believe it has to be something with apple devices. ALl the other cords will work in the port but my cord. It works fine in other computers, so I don't know what to do. We live far away from an apple store, so I don't really want to drive there just for this.

Please help!