I tried the Jetpack and it worked but it only showed the recent stats.. so, i deactivated it and activated the wordpress.com stats again and it showed the same message:
“Your WordPress.com account is not authorized to view the stats of this blog. Currently access to stats is broken for some users and we are working on fixing this. Your stats are still being counted and will be visible once we restore access for your account.”
I’ll just wait for them to fix it..