In my directory (http://www.dir4you.net), I managed to place some ads. However, when I try and place ads underneath the search bar in the open space, the ads never appear, no matter how hard I try. When I put it in, there is a big white space where the ads should be, but they don't appear.
I don't even seen the second ad unit in your source code, add it to your site and re-update this thread.
There's not that much content on the page to start off with. I assume it should pick up keywords and show the ads anyways. Try adding them back in and waiting 1-2 hours. Also, it would help to make sure there is at least some sort of wording on the page about directories, etc. I also think your meta description tag is a little to long. EDIT: This is assuming you already removed the 2nd add code.
I can see what it is already, the Adsense code is being smushed together and making it not work, view the source yourself, you must properly insert it in the right format into your website.
Well I've put it in the code for the top bar of the directory, so how can I place the code in the right place of the directory?
Well in the directory script (PHP Links Directory) I accessed the template folder and saw top_bar file. This is the file that is the template for the links to the pages and everything, so I just put the adsense code at the top of there.
Post that file as attachment and a seperate txt file with the adsnese code you want in their, I'll set it up for you.