ارر session.php

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/sariches/public_html/configuration.php:1) in /home/sariches/public_html/libraries/mambo/session/session.php on line 423

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/sariches/public_html/configuration.php:1) in /home/sariches/public_html/libraries/mambo/session/session.php on line 423

Warning: Cannot modify header information - headers already sent by (output started at /home/sariches/public_html/configuration.php:1) in /home/sariches/public_html/libraries/mambo/session/session.php on line 426

سلام خسته نباشید
با این ارر چه کنم ؟