Can you debug a site with Drush?
That error is often caused by PHP files that generate output they should not. Generally it's caused by errors like having a closing ?> and then a blank line at the end of the file. It's possible that a blank line was added during whatever process you used to move the file to the production server (git, lots of editors, and a few FTP clients will sometimes do this automatically).

In your case I would check /home/zantech0/public_html/yoursitename.com/themes/business/includes/skins-menu/skins_menu.inc to see if it does something that generates output (and therefore triggers PHP to send response headers).