Warning: Cannot add header information - headers already sent by...

[DrkFusion]

Warning: Cannot add header information - headers already sent by (output started at www/html/archive/index.html:5) in home/forum/public_html/admincp/functions.php on line 1629

*note I made up the paths, due to security reasons ;)

What does that mean?

[DrkFusion]

Line 1629 of functions.php
setcookie($name, $value, $expire, $cookiepath, $cookiedomain, $secure);