Here's a few steps I suggest you take.
Move ads around to increase CTR. A good goal for proxies, in my opinion, are 1% CTR
Redirect crappy traffic elsewhere. I generally send them to a proxy listing site.
Don't buy garbage traffic from proxy.org. I find that the traffic from there rarely if ever pays well, and hardly click ads.
Take a look at your on page copy for the page. Reread it a couple times and see if it seems natural, and then take into account keywords you're using/targeting on the page that may trigger high paying ads.