Thank you both for your help. I don´t know what exactly caused the problem but it looks like the missing exit; was
one part of it. Since I finished the script there were no
more complaints from our provider. We now have about
700 Visitors a day and most of them call detail.cgi
for example http://www.master-productions.com/...detail.cgi?ID=476832. This script searches for the ID, looks if in the pictures path is an image with the
name id.gif or id.jpg then look in a detailed table if there is a detailed text and then it opens another table and looks if there are products related to the id and then it searches again in the main databese for the information about the related products. but it seems to run stable now.

Cheers
Niko

http://www.master-productions.com