Error - Problem Z Sesjami ? Opcje

[boya]

witam
mam na stronce start sesji session_start();
a jak odpalam www to wyskakuje mi taki error

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/users/boya/public_html/ba/index2.php:10) in /home/users/boya/public_html/ba/page/ksiega.inc.php on line 2

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/users/boya/public_html/ba/index2.php:10) in /home/users/boya/public_html/ba/page/ksiega.inc.php on line 2

jak go zlikwidować ?

pozdrawiam
TOMEK