Your function is missing or your include file is not included, can't say much more from just looking at the page. You'll have to post some of the code.
line 1 of your index.php file is calling a function by the name of get_headers(). where is that function defined?
This function has to be defined somewhere. Most likely you have a file that's not included. Look for the file that contains the function and put this at the beginning of your code <?php include 'file.php'; ?> PHP: Is this wordpress ? This code is quite familiar PS no I don't have msn but you can come to live chat (the website in my sig).