Adding require to settings.php kills site

I'm trying to install Facebook on my site, and had my account temporarily suspended by my host because:

Your collegeboom.threebase.com subdomain overloaded our server with 300 concurrent hanging requests to /modules/fb/settings.inc

I'm following all of the directions best I can, but keep hitting the same problem. When I add the require statement to settings.php and then try to look at any page on my site, it hangs. Getting rid of the require once statement makes everything okay again, except that Facebook for Drupal is enabled but not working properly.

This is the line I added to the bottom of my settings.php file:

require_once "http://www.collegeboom.com/modules/fb/settings.inc";

The modules/fb directory contains all of the files that came with my d/l of the module, plus a facebook-platform folder that contains the php4client directory I got from facebook, and also the simplexml files that facebook directed me to download.

Any insight/suggestions as to how I can fix this without getting the boot from my host for pounding their servers any further?

Thanks