My iPod Nano 7th Generation couldn't be detected by iTunes when I plugged in. I tried resolving the issue by uninstalling the iTunes and then install it back again but yet still the same problem exist. Can you please help me to solve this issue?

My iPod Nano 7th Generation couldn't be detected by iTunes when I plugged in. I tried resolving the issue by uninstalling the iTunes and then install it back again but yet still the same problem exist. Can you please help me to solve this issue? I have already updated to the latest version of iTunes on my Windows 8 and I cannot synchronize my iPod for the time being. Please do help me to solve this problem. Thank You.