Bad placement. Try putting 468x60 banners in between posts or at the end of posts. Make sure they blend with the background and have no border. Or same color border as your background.
I think you need to either space your ads out more or get rid of some because all I can see on that page is "Ads By Google" everywhere, you need to merge much more than you are. It may be an idea to set one of your ads to image only to break up all the random text everywhere. The tip for Google ads is Merge . . .
How popular is that advert placed in the banner? its a shame because it ruins the website image, you really shouldnt ruin your website header
When people get over the top with their ads it has 2 problems, 1 - it reduces the quality of your site i.e you lose credibility 2 - you actually don't get as much money per click.
Twan, sorry mate but the placement sucks big time. That large banner at the top should go. No-one will click on it, imo, and as someone has already stated, it diminishes the credibility of the site. What are you using to place the ads? By that I mean, have you edited the template or are you using a plugin?
Well, are you getting many hits Try moving your ads to a better location for CTR [eg. under the logo]...
The first thing I saw was ads. Blend them in, and also take the one off of your header. Makes me think that all you care about is making money.