Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/buckey20/public_html/index.php:4) in drupal_send_headers() (line 1490 of /home/buckey20/public_html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/buckey20/public_html/index.php:4) in drupal_send_headers() (line 1490 of /home/buckey20/public_html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/buckey20/public_html/index.php:4) in drupal_send_headers() (line 1490 of /home/buckey20/public_html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/buckey20/public_html/index.php:4) in drupal_send_headers() (line 1490 of /home/buckey20/public_html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/buckey20/public_html/index.php:4) in drupal_send_headers() (line 1490 of /home/buckey20/public_html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/buckey20/public_html/index.php:4) in drupal_send_headers() (line 1490 of /home/buckey20/public_html/includes/bootstrap.inc).