Thanks but none of that helps.

The site is <http://www.1eden.net/diy>

Load it in a browser, it works fine. Try it with httrack emulating any
useragent and it does not work because the server is sending 404 codes for
most pages, even though they clearly exist.

You can test the http response code the server sends here;

<http://validator.w3.org/>

>404 Not Found for <http://www.1eden.net/diy>