hi my ads was giving 0.2 dor a click but 20 days ago they started to give 0.02 or even less here are the pages that contains ads http://www.expenglish.com/download.php http://www.expenglish.com/dic/ http://www.expenglish.com/?q=node/3 so what is the problem, should i change the placement, they are giving a good ctr but no revenue