I took a look at your site. 59 pages, as you stats are saying, is not a lot of articles. Also, some of the pages are very short. Your markup also appears to be a bit off, e.g. I didn't find any headlines using the h1 tag, which is one of the important tags for spiders.
You may be overdoing it with the adds. Sometimes less is more. Fewer and more prominent adds may be the answer (this can only be determined by trying out different sizes and placements). At least consider spreading the adds a little more over the page.
Have you considered doing the pages in other languages? Competing for visitors in lesser used languages can be an advantage. Even though Danish is a small language (5 million people) I earn more money on my Danish pages than my English pages.
Having said that, earning a decent income from a site is difficult... very difficult!