JVC car stereo won't recognize Ipod Nano

In 2006 my husband bought me a JVC car stereo with a USB port. So, a couple months ago, I finally went and bought a new Ipod Nano. When I plug the Ipod into the stereo, it says "READ FAIL" on the stereo screen. I went to BestBuy thinking I needed a different cord or something, but they told me it was a problem with new Ipods. The technician even went and got his older Ipod and plugged it in and it worked great. I contacted JVC, but they were no help at all. Can anyone help me? I am so frustrated!