Header Error: include_once

I am getting a header error instead of my header on my blog. It reads:
Warning: include_once(http://thebirdersreport.com/wp-custom/auto-dis.cp) [function.include-once]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /home/ljordan/public_html/wp-content/themes/Cutline 1.1-3ColumnSplit/header.php on line 19

Warning: include_once() [function.include]: Failed opening ‘http://thebirdersreport.com/wp-custom/auto-dis.cp’ for inclusion (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/ljordan/public_html/wp-content/themes/Cutline 1.1-3ColumnSplit/header.php on line 19

What do I need to do to resolve this error? Thanks for your help, Larry