PHP Header issue

<html> <head> <title>Contact Us</title> </head> <body> <?php header("Location: advertise2.php"); ?> </body> </html> The above is just snippet of the code but even this simple example throws the Header Warning / Error. Warning: Cannot modify header information - headers already sent by (output started at /home/content/g/t/a /html/yourestate/advertise.php:6) in/home/content/g/t/a /html/yourestate/advertise.php on line 6 The anwser may be simple but I have looked a blanks or spaces around the <?php ?> with no success. Ready need your help. Thanks, Ernie Kemp Phone: 416 577 5565 Email: ekemp@digitalbiz4u.com ...man will occasionally stumble over the truth, but usually manages to pick himself up, walk over or around it, and carry on. Winston S. Churchill