Q: Problem on sending workout datas to nikeplus.com

I know this already been asked. But that post is like 3 years ago so this might be new. I just bought a new 7th gen iPod Nano, so after running and walking around to get the feel. I plug my iPod into my MacBook and a pop up says iTunes could not connect to Nike+ (shown in the picture below). Even though my internet is up and running smoothly. Does anyone knows how to fix this? Thanks.