iTunes cannot connect to Nike+ (6th gen)

Hi,

I have already 10 workouts that cannot be synced with nikeplus.com. I am getting message in iTunes there is maintanance on the Nike+ web to try it later. It' s been now more than half a year. Is it relly a web issue so I have to send info to nikeplus.com to fix it/ or is it iTunes issues?

Thank you