Arkadaşlr ben şöyle hatalar arıyorum nasıl düzeltebilirim
Ayrıca kayıtta güvenlik kodu resmi gözüküyor içerisinde kod gözükmüyor.Login olduğum zaman sayfa bembeyaz açıllıyor.Error_log dosyasında bunlar vardı

  [29-Jul-2010 16:49:22] PHP Warning:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /home/klan/public_html/xxx/antet.php:1) in /home/klan/public_html/xxx/antet.php on line 18 
[29-Jul-2010 16:49:27] PHP Warning:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /home/klan/public_html/xxxx/antet.php:1) in /home/klan/public_html/xxx/antet.php on line 18 
[29-Jul-2010 16:49:29] PHP Warning:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /home/klan/public_html/klan/antet.php:1) in /home/klan/public_html/xxx/antet.php on line 18 
[29-Jul-2010 16:49:34] PHP Warning:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /home/klan/public_html/xxx/antet.php:1) in /home/klan/public_html/xxx/antet.php on line 18 
[29-Jul-2010 16:49:34] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/klan/public_html/xxx/antet.php:1) in /home/klan/public_html/xxx/login_.php on line 22 
[29-Jul-2010 16:49:52] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/xxxx/public_html/klan/antet.php:1) in /home/klan/public_html/xxx/func.php on line 18 
[29-Jul-2010 16:49:59] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/klan/public_html/xxx/antet.php:1) in /home/klan/public_html/xxx/func.php on line 18