Appserv e le sessioni

[Alex90]

Salve, non capisco come mai appserver mi da questi errori

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\AppServ\www\giochi-flash\servizi\dologin.php:5) in C:\AppServ\www\giochi-flash\servizi\dologin.php on line 27

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\AppServ\www\giochi-flash\servizi\dologin.php:5) in C:\AppServ\www\giochi-flash\servizi\dologin.php on line 27

Warning: Cannot modify header information - headers already sent by (output started at C:\AppServ\www\giochi-flash\servizi\dologin.php:5) in C:\AppServ\www\giochi-flash\servizi\dologin.php on line 70
Accesso effettuato correttamente 

Il codice è questo

include("../include/config.php");
session_start();
session_unset();
session_destroy();
session_start(); 

Ciao e grazie

[Alex90]

O proto anche con wmserver

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at C:\WM\www\giochi-flash\include\menu-sinistra.php:8) in C:\WM\www\giochi-flash\servizi\dologin.php on line 27

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at C:\WM\www\giochi-flash\include\menu-sinistra.php:8) in C:\WM\www\giochi-flash\servizi\dologin.php on line 27

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at C:\WM\www\giochi-flash\include\menu-sinistra.php:8) in C:\WM\www\giochi-flash\servizi\dologin.php on line 30

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at C:\WM\www\giochi-flash\include\menu-sinistra.php:8) in C:\WM\www\giochi-flash\servizi\dologin.php on line 30

Warning: Cannot modify header information - headers already sent by (output started at C:\WM\www\giochi-flash\include\menu-sinistra.php:8) in C:\WM\www\giochi-flash\servizi\dologin.php on line 74
Accesso effettuato correttamente 

Mi da lo stesso errore come posso fare??

Ciaoo