请教！phpnuke6.5 为什么会出现warning?

ltkun

http://www.sysunix.com/modules.php?name=Forums


Warning: Cannot modify header information - headers already sent by (output started at /mail/wdpost/http/htdocs/VirtualHost/www.sysunix.com/header.php:32) in /mail/wdpost/http/htdocs/VirtualHost/www.sysunix.com/includes/sessions.php on line 222

Warning: Cannot modify header information - headers already sent by (output started at /mail/wdpost/http/htdocs/VirtualHost/www.sysunix.com/header.php:32) in /mail/wdpost/http/htdocs/VirtualHost/www.sysunix.com/includes/sessions.php on line 223

能否去掉warning?怎么去掉？谢谢！