error on header

[maszen]

hello im just finished install OsCommerce on my site, but i find this problem on header like this.

 

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Warning: session_save_path() [function.session-save-path]: SAFE MODE Restriction in effect. The script whose uid is 742 is not allowed to access /tmp owned by uid 0 in /home/fio/public_html/shop/includes/functions/sessions.php on line 169

 

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/fio/public_html/shop/includes/functions/sessions.php:169) in /home/fio/public_html/shop/includes/functions/sessions.php on line 102

 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/fio/public_html/shop/includes/functions/sessions.php:169) in /home/fio/public_html/shop/includes/functions/sessions.php on line 102

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how i can fix this problem, ???

 

Thanks