Cake warning Cannot modify header information and CORE/Cake/Network/CakeResponse.php, line 398

hi all

what's the reason of this warning?


Warning (2): Cannot modify header information - headers already sent
by (output started at
/home/hy4wtsgf/public_html/lib/Cake/Utility/Debugger.php:780)
[CORE/Cake/Network/CakeResponse.php, line 398]
Code Context

setcookie - [internal], line ??
CakeResponse::_setCookies() - CORE/Cake/Network/CakeResponse.php, line 398
CakeResponse::send() - CORE/Cake/Network/CakeResponse.php, line 375
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 168
[main] - APP/webroot/index.php, line 92

how can i resolve it?

thanks in advance

--
Like Us on FaceBook https://www.facebook.com/CakePHP
Find us on Twitter http://twitter.com/CakePHP

---
You received this message because you are subscribed to the Google Groups "CakePHP" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cake-php+unsubscribe@googlegroups.com.
To post to this group, send email to cake-php@googlegroups.com.
Visit this group at http://groups.google.com/group/cake-php?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.