pfcuserconfig.class.php on line 25

[ehsan_shiraz]

would you please help me ?! I have installed this program on servere and this error is shown to me :

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/dental00/public_html/Chat/src/phpfreechat.class.php:1) in /home/dental00/public_html/Chat/src/pfcuserconfig.class.php on line 25


I dont know what should I do ! when the program is on localhost it works ,but when it is on the server it doesnt! thank you very much...