ONLINE POKER - SITE - PokerStars

I have played at other poker sites and feel pokerstars is the best, however im now having problems signing on to pokerstars. I deleted pokerstars from my computer and did a re-download, but now everytime i try to open the pokerstars icon a screen apears with the words "internet conectivity failure", what does this mean and how do i get back on pokerstars???? I've tried everything