two steps you can do. keep try to reconnect or reboot your pc and connect it again.
I also met this prob today, and after reboot my pc, it is works. if not mistake, i think it is your pc prob (if you use pc version). or the router prob
Well shortly after my last post I unplugged and re plugged in my router and after that it worked. Sorry i didnt reply until now... i was in withdrawl ;