> <http://abc.com/content.php?show=galleries&gallery=7&>;
> section=1 
> 
> When I paste this into HTTrack, it doesn't download
> anything.
When I try that link in my browser I get:
We're sorry, the page or file you are looking for no longer exists or has been
moved. Please check the link and try again.

Either you have a bad link, or a cookie has to be set by a previous page.