this plugin don't work any more?

Make sure that you have not ‘Disable all ads:’ set in the settings of click fraud plugin.

It does exactly the same thing to me since today and I don’t have the Disable ads enabled. What’s happening ?

Delete all blocked ips and check if its working than.

Just did and it worked, but what’s the point of having ips blocked for let’s say a week if I have to unblock them in order to have the plugin working…?

This was just a test to see if your own ip had been in the list of blocked ip′s.

Obviously it was. I do not know the reason for this, maybe you clicked by accident on your own ads.