repot google for this clicks to avoid disabling your account http://www.google.com/adsense/support/bin/request.py
I think you yourself clicked your ads (invalid clicks). In this condition, google will not pay you. otherwise some click bots maybe the reason for making you clicks. Have you joined any Click generating programs? If yes, please stop it. otherwise it will lead to banning of your adsense account. Submit your problem to Adsense Contacting Support
Well looking at that, thats not even as if someone else is coming into the site to click your ads thats you clicking them yourself. I say this as the clicks are well over the amount of impressions that the clicks have shown so that means someone (used very loosely) is clicking the ads while loading them into another window. Looks like your account will be banned within 48 hours. If it is you doing it, then you have shot yourself in the foot BIG TIME, if not you better get it reported and offer full disclosure to your system to them...
this is happened with me as i have 12 clicks and no earnings and i thing that what happened it that one person makes all this clicks on the same ad so Google not accounts them on the earnings because they considered as spam
Maybe clicks are coming from a country which traffic has no value to google. Or a single user is clicking same ads again and again. I myself experienced this a few times. But don't worry It is safe. Nothing will happen to your account. Google knows whats happening.
I guess all the clicks that you are talking about must be from "Same Page" ie. same url . Check your google analytics for traffic distribution !