Audio not working 2.6 issue

I uploaded the backup for the site and still nothing but know I have a new message: Warning: require(/home/thejazzs/public_html/gospeljazzsite/wp-includes/media.php) [function.require]: failed to open stream: No such file or directory in /home/thejazzs/public_html/gospeljazzsite/wp-settings.php on line 269

Fatal error: require() [function.require]: Failed opening required ‘/home/thejazzs/public_html/gospeljazzsite/wp-includes/media.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/thejazzs/public_html/gospeljazzsite/wp-settings.php on line 269

can anyone help with this one!