Errors

I started getting these errors on my site when I edited the index.php file. I didn’t make a backup (i just forgot). So can anyone tell me what these errors mean and how I can go about fixing them?

http://piecesofmike.com/

Warning: main(./wp-blog-header.php): failed to open stream: No such file or directory in /home/x/public_html/index.php on line 3

Warning: main(./wp-blog-header.php): failed to open stream: No such file or directory in /home/x/public_html/index.php on line 3

Fatal error: main(): Failed opening required ‘./wp-blog-header.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/x/public_html/index.php on line 3