Strange behaviour on win2k

I'm experiencing some strange and frustrating behaviour with my current setup.. I'm running Win2K, IIS4, and php4 (this problems happens with btoh the .exe and .dll versions) I have something like this: <?php echo join("", file("http://localhost/")); ?> Run from command line this works as expected (it goes to the web server on my local machine and fetches the page and displays it) Trying to access this file through IIS results in this: Warning: file("http://localhost/") - No such file or directory in <path to my .php file> on line 5 However, if I change the line to something like echo join("", file("http://yahoo.com/")); it works fine and returns Yahoo's web page (through IIS). Any idea why this would work for everything except my local machine? (Note: I've tried replacing localhost with the domain name and IP address of my machine, and get the same problem.) And why does it work from the command line and not through IIS? Thanks for your help, zach wily