Segmentation faults on headers()

Hello, I have a problem I can't quite figure out. I recently upgraded PHP from 4.0.6 to 4.1.0. I can no longer use auth-headers... When I try to load a page with for instance: <?php if(!isset($PHP_AUTH_USER)) {

     header('WWW-Authenticate:  Basic realm="Admin Area"');
     header('HTTP/1.0 401 Unauthorized');
     echo 'Authorization Required.';
     exit;

} else {

       echo "this is it";

} ?> I receive a "Page can not be displayed" error on the browser. When I look at the httpd/error file, I see the following error: [Wed Dec 19 21:48:27 2001] [notice] child pid 4996 exit signal Segmentation fault(11) I can't seem to figure out what this means...something has gone haywire, but I can't tell what it is. Anyone know what this is? Thanks, Scott _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx