My new Ipod shuffle isn't being recognized by my existing Itunes Account. I plug it in and nothing pops up

I just bought a new ipod shuffle to relplace my old one. i thought i could just open my existing itunes account and plug in the new shuffle and it would prompt me to add the new ipod to this account. When I plug in the new ipod nothing happens at all. Nothing opens up to recognize the new ipod at all. I am up to date on itunes downloads and i restarted my computer. I have tried plugging in the new ipod several times to no avail. no acknowledgement at all. no devices at all. do i have to download itunes again each time i buy a new ipod?