session cache limiter

[IISecurity.C]

با سلام من سایتم رو از سرور قدیمی به سرور جدیدم انتقال دادم الان به اررور زیر مواجه شده ام .لطفا راهنمایی کنید چه تنظیماتی روی سرور باید انجام بدم تا مشکل حل بشه !!

Warning: session_save_path() [function.session-save-path]: SAFE MODE Restriction in effect. The script whose uid is 32020 is not allowed to access /tmp owned by uid 0 in /home/***/public_html/includes/functions/sessions.php on line 151

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/***/public_html/includes/functions/sessions.php:151) in /home/afra427/public_html/includes/functions/sessions.php on line 100

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/***/public_html/includes/functions/sessions.php:151) in /home/afra427/public_html/includes/functions/sessions.php on line 100