Unable to display ads

I have followed the instructions on the 'Set up' page as well as I can. I have CHMOD'd the .txt file (ad_network_ads_308.txt) to 777.

I have placed the .htacces file in the root directory (1 level lower than the WWW folder) of my site. It contains what is listed on the 'Set up' page.

I have added this:
<?php
ini_set ("include_path", ini_get ("include_path") . ':../:../../:../../../:../../../../');
include ('ad_network_309.php');
echo $ad_network;
?>
to my .html files, just abov the </body> tag.

My files end in .html.

I got a bit lost with whether I should use the php stuff above or the 'include'?

It's telling me my site is not validating and I cannot see any ads! I'm a little lost here, so all help will be greatly appreciated.

 

I had another quick look at all this last night and still can't see where I've gone wrong. Can anyone help or anyone have any ideas?

Thanks for any help.

 

The URL is www.safelistsupplies.com The code is at the bottom of the page.

Thanks very much.

 

Source code shows php code, you aren't parsing

 

How do I get it to be parsed? Do I need to do something or get my hoster to change/add something for me?

Many thanks.