Work on your page content (Title, description, paragraph). Ads will vary depending of the content of your page. Try to have enough text to allow AdSense to have ads targeting your website. The payouts should increase. Your website content may not target high paying ads. Freeware website have low payouts while law website have high payouts.
Your eCPM depends directly on it's content. Either your content is low paying or your quality is really low. Either way, work on your content. If you can't improve your content then try increasing your traffic and CTR!
check THIS site out! It shows you how to increase and control your CTR as much as you want!!! the more clicks you generate the better Google likes you, thus increasing you eCPM