Undefined index: PATH_INFO

Hi there, I need some help please. I’ve registered and set up the Co-op stuff. Created a file called "ad_network_255.php" and pasted the contents in to there that I got in the setup page of the Coop Ad Network. I created the "ad_network_ads_255.txt" and set the CHMOD to 666, which works because now the file is filled with the links. My site is all custom php, so no need to edit .htaccess...? And they are all located in the same directory. To put the ads in place I’ve created a seperate file with the proper code from the Setup page and put it in place with "include". ... Now I’m getting this on all pages, errors and below them the text links --> Notice: Undefined index: PATH_INFO in /home/user/public_html/ad_network_255.php on line 78 Notice: Undefined index: PATH_INFO in /home/user/public_html/ad_network_255.php on line 78 Notice: Undefined index: PATH_INFO in /home/user/public_html/ad_network_255.php on line 78 Notice: Undefined index: HT...